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Effects of Micrometer-Sized Graphite-Flake to Reinforce the Performances of Poly (Lactic Acid) Thermoplastic Biocomposites

S. Alam, M. F. Mina, M. J. Rahman,  M. A. Gafur, K. H. Maria, T. Mieno, A. K. M. Moshiul Alam and M. D. H. Beg

Abstract

Material properties of sponge-gourd fiber–reinforced polylactic acid biocomposites: Effect of fiber weight ratio, chemical treatment, and treatment concentrations

Taimur Al-Mobarak, M. F. Mina and M. A. Gafur

Abstract

Sponge-gourd fibers (SGFs) were subjected to chemical treatments such as alkalization, acetylation, and benzoylation by 5−15 wt% sodium hydroxide, acetic anhydride, and benzoyl chloride solutions, respectively, in order to improve fiber–matrix adhesion. SGF-reinforced polylactic acid (PLA) biocomposites were fabricated using melt compounding technique. Both untreated and chemically treated fiber-reinforced composites were subsequently characterized by using a field emission scanning electron microscope, a Fourier-transform infrared spectrometer, an X-ray diffractometer, a universal testing machine, and a thermogravimetric analyzer. Structural analyses show that the chemical treatment improves the crystallinity of SGF and exhibits chemical bond formation in the SGF-reinforced PLA composites. Surface morphology indicates that after the treatment of fibers and increase in the treated fiber content, the interfacial adhesion between PLA and fibers is improved. The effects of fiber loading of chemically treated SGF on physical and mechanical properties of the composites were analyzed. Compressive strength of the composites was increased by 10–35% with incorporation of treated fibers into the PLA matrix. The thermal stability of them is found to increase significantly. Soil burial test has confirmed that the composites are biodegradable. Benzoylation of SGF shows superior mechanical properties and enhances thermal stability among the composites.

Modified Vonk’s Method to Determine Crystallinity and Crystal Distortion in Polymers

T. Asano, S. Sano, T. Okabe, T. Sano, H. Itagaki, C. Sawatari, and M. F. Mina

Abstract

Modification of structure and properties of well-dispersed dendrimer coated multi-walled carbon nanotube reinforced polyester nanocomposites

A. K. M. Moshiul Alama, M. D. H. Beg, R. M. Yunus, M. Bijarimi, M. F. Mina, K. H. Maria, T. Mieno,

Abstract

Preparation and Characterization of Raw and Chemically Modified Sponge-Gourd Fiber Reinforced Poly Lactic Acid Biocomposites

Taimur-Al-Mobarak, M. A. Gafur and M. F. Mina

Abstract

Effect of Chemical Modifications on Surface Morphological, Structural, Mechanical, and Thermal Properties of Sponge-gourd Natural Fiber

Taimur-Al-Mobarak, M. F. Mina, M. A. Gafur, A. N. Ahmed, and S. A. Dhar

Abstract

Evolution of functionalized multi-walled carbon nanotubes by dendritic polymer coating and their anti-scavenging behavior during curing process

A. K. M. Moshiul Alam, M. D. H. Beg, R. M. Yunus, M. F. Mina, K.H. Maria and T. Mieno

Abstract

Effects of fibre surface treatment on the properties of hybrid composites prepared from oil palm empty fruit bunch fibres, glass fibres and recycled polypropylene

M. R. Islam, A. Gupta, M. Rivai, M. D. H. Beg and M. F. Mina

Abstract

Improvement of interaction between pre-dispersed multi walled carbon nanotubes and unsaturated polyester resin

M. D. H. Beg, A. K. M. Moshiul Alam, R. M. Yunus, M. F. Mina

Abstract

Copper nanoparticle in cationized palm oil fiber: physico-chemical investigation

M. N. K. Chowdhury, M. D. H. Beg, Maksudur R. Khan and M. F. Mina, and A. F. Ismail

Abstract

Degradation and Stability of Oil Palm Empty Fruit Bunch Fiber Reinforced Poly (Lactic Acid) Biocomposite: Effect of Fiber Length

A. K. M. M. Alam, M. D. H. Beg, , M. F. Mina, A. A. Mamun, and A.K. Bledzki

Abstract

Thermo-Mechanical and Morphological Properties of Short Natural Fiber Reinforced Poly (Lactic Acid) Biocomposite: Effect of Fiber Treatment

A. K. M. M. Alam, M. F. Mina, M. D. H. Beg, A. A. Mamun, A.K. Bledzki and Q. T. H. Shubhra

Abstract

Fabrication of Strong and Thermally More Stable Jute-Fabric/Polypropylene Composites by Compression Molding along with g-Ray Irradiation

M. H. S. Shohrawardy, M. K. Alam, M. F. Mina and Mubarak A. Khan

Abstract

Structural, Mechanical, Thermal and Electrical Properties of Carbon Black Reinforced Polyester Resin Composites

M. K. Alam, M. T. Islam, M. F. Mina, M. A. Gafur

Abstract

Fibre Surface Modifications through Different Treatments with the help of Design Expert Software for Natural Fibre Based Biocomposites

M. R. Islam, M.D.H. Beg and M. F. Mina

Abstract

Structures and Properties of Injection Molded Biodegradable Poly(Lactic Acid) Nanocomposites Prepared with Untreated and Treated Multi-Walled Carbon Nanotubes

M. F. Mina, M.D.H. Beg, M. R. Islam, A. Nizam, A. K. M. M. Alam and R M. Yunus

Abstract

Copper nanoparticles for improving the mechanical performances of oil palm empty fruit bunch fibers as analyzed by Weibull Model

M. N. K. Chowdhury, M. D. H. Beg, Maksudur R. Khan and M. F. Mina

Abstract

Crystalline Morphology and Properties of Multi-Walled Carbon Nanotube Filled Isotactic Polypropylene: Influence of Filler Size and Loading

M. K. H. Bhuiyan, M. M. Rahman, M. F. Mina, M. R. Islam, M. A. Gafur, A. Begum

Abstract

Simultaneous effects of coupling agent and flame retardant on empty fruit bunch fiber/polypropylene composites

M. D. H. Beg, S. Samahani, M. F. Mina and R. M. Yunus

Abstract

Modification of oil palm empty fruit bunch fibers by nanoparticle impregnation and alkali treatment

M. N. K. Chowdhury, M. D. H. Beg, Maksudur R. Khan and M. F. Mina

Abstract

Synthesis of copper nanoparticles and their antimicrobial performances in natural fibres

M. N. K. Chowdhury, M. D. H. Beg, Maksudur R. Khan and M. F. Mina

Abstract

Improved mechanical Performances of Triple Super Phosphate Treated Jute-Fabric Reinforced Polypropylene Composites Irradiated by Gamma Rays

M. F. Mina, H. S. Shorowardy, Mubarak A Khan, A. K. M. M. Alam, M.D.H. Beg

Abstract

Optimal Performances of Ultrasound Treated Kenaf Fibre Reinforced Recycled Polypropylene Composites as Demonstrated by Response Surface Method

M. R. Islam, M. D. H. Beg, A. Gupta and M. F. Mina

Abstract

Structures and Performances of Simultaneous Ultrasound and Alkali Treated Oil Palm Empty Fruit Bunch Fiber Reinforced Poly(Lactic Acid) Composites

A. K. M. Moshiul Alam, M. D. H. Beg, D. M. Reddy Prasad, M. R. Khan and M. F. Mina

Abstract

Maksudur R. Khan and A. K. M. M. Alam, Synthesis and characterization of radiation grafted films for removal of arsenic and some heavy metals from contaminated water

M. N. K. Chowdhury, M.W. Khan, M. F. Mina, M. D. H. Beg

Abstract

Multi-Walled Carbon Nanotubes Reinforced Isotactic Polypropylene Nanocomposites: Enhancement of Crystallization and Mechanical, Thermal and Electrical Properties

M. A. Haque, M. F. Mina, A.K.M. M. Alam, M. J. Rahman, M. A. H. Bhuiyan, and T. Asano

Abstract

Effect of Rolling Deformation on the Structures and Properties of Multi-Walled Carbon Nanotubes Filled Isotactic Polypropylene

M. F. Mina, M. A. Haque, M. A. Gafur and T. Asano

Abstract

X-ray diffraction study of iPP/clay and iPP/TiO2 composites relating to micromechanical properties

M. E. Cagiao, F. J. Balta Calleja, F. Spieckermann, S. Scholtyssek, M. F. Mina, M. A. H. Bhuiyan

Abstract

Structural, elastic and thermal properties of titanium dioxide filled isotactic polypropylene

A. H. Bhuiyan, M. F. Mina, S. Seema, M. M. Khan, M. J. Rahman, M. A. Gafur

Abstract

Structures and properties of the compression-molded istactic-polypropylene/talc composites: Effect of cooling and rolling

M. A. Gafur, R. Nasrin, M. F. Mina, A. H. Bhuiyan, Y. Tamba, and T. Asano

Abstract

Structural, Mechanical and Thermal Studies of Double-molded Isotactic Polypropylene Nanocomposites with Multi-Walled Carbon Nanotubes

M. F. Mina, M. A. Haque, M. K. H. Bhuiyan, M. A. Gafur, Y. Tamba, and T. Asano

Abstract

Structures and performance of white-clay filled isotactic-polypropylene composites prepared by double-molding techniques

M. F. Mina, Nasima Banu, Abdur Razzak, Md. Jellur Rahman, Md. Abdul Gafur and Md. Abu Hashan Bhuiyan

Abstract

Laser Light and X-Ray Diffraction Studies of the Oriented Isotactic Polypropylene Prepared by the Temperature Slope Crystallization

T. Asano, T. Furusho, M. M. Alam, Y. Tamba, C. S. and M. F. Mina,

Abstract

Improved performance of isotactic polypropylene/titanium dioxide composites: Effect of processing conditions and filler

M. F. Mina, S. Seema, R. Matin, M. J. Rahman, R. B. Sarker, M. A. Gafur and M. A. H. Bhuiyan

Abstract

Layer Structure Formation in Oriented Poly (ethylene terephthalate) Relating to Micromechanical Properties

T. Uchiyama, M. Suyama, M. M. Alam, T. Asano, S. Henning, A. Flores, F. J. Balta Calleja and M. F. Mina

Abstract

Studies of Micromechanical Deformation Processes In Particle-Filled Glassy Polymer

M. F. Mina, M. N. K. Chowdhury, A. K. M. M. Alam, S. Bhattachariaya and G. H. Michler

Abstract

Synthesis of Polyelectrolyte and Studies of its Conductivity Changes with Respect to Molecular Weight

M. N. K. Chowdhury, M. F. Mina, A. K. M. M. Alam, F. Akhtar

Abstract

Micromechanical Properties of Poly(butylene Terephthalate) Nanocomposites with Single- and Multi-walled Carbon Nanotubes

F. Ania, G. Broza, M. F. Mina, K.  Schulte, Z. Roslaniec, F. J. Balta Calleja

Abstract

Swelling Behavior of Acrylamide Hydrogel in Different Solvents and pHs

M. F. Mina and M. M. Alam

Abstract

Morphology, Mechanical and Thermal Properties of Undeformed and Mechanically Deformed Poly (Methyl Methacrylate)/Rubber Blend

M. F. Mina, A. K. M. M. Alam, M. N. K. Chowdhury, S. K. Bhattacharia, and F. J. Balta Calleja

Abstract

Microhardness Studies of the Interphase Boundary in Rubber-Softened Glassy Polymer Blends Prepared with/without Compatibilizer

 M. F. Mina, M. E. Haque, F. J. Balta Calleja, T. Asano and M. M. Alam

Abstract

Micromechanical Behavior and Glass Transition Temperature of Poly (methyl methacrylate)/Rubber Blend

M. F. Mina, F. Ania, T. A. Huy, G. H. Michler and F. J. Balta Calleja

Abstract

Optimization of Synthesis and Characterization of Acrylamide Hydrogel by γ-ray Irradiation

M. A. Chowdhury, M. M. Alam, M. F. Mina, F. Akthar and S. E. Kabir

Abstract

Thermal and X-ray Measurements on n-Hexatriacontane

M. F. Mina, T. Asano, B. Poirier, D. Mondieig, A. Wuerflinger and C. Josefiak

Abstract

Microhardness Studies of PMMA/Natural Rubber Blends

M. F. Mina, F. Ania, F.J. Balta Calleja and T. Asano

Abstract

Effect of Monomers in the Structural Modification of Natural Rubber during γ-Ray Irradiation

M. F. Mina, T. Asano, N. C. Dafader, F. Akthar, S. Yoshida, N. Tohyama, K. Imaizumi

Abstract

Effect of SBS Compatibilzer on the Interphase Boundary of Polymer Blends of Polystyrene and Natural Rubber

M. Boyonova, M. F. Mina, F.J. Balta Calleja and S. Fakirov

Abstract

Effect of Gamma Rays in the Preparation of Polymer and Hydrogel from Acrylamide Monomer

M. M. Alam, M. F. Mina, F. Akthar

Abstract

Swelling and Hydration Properties of Acrylamide Hydrogel in Distilled Water

M. M. Alam, M. F. Mina and F. Akthar

Abstract

Centrifuging Effect on the Structure and Property of Natural Rubber Latex Films

 M. F. Mina, M. M. Alam, F. Akthar, S. Yoshida, N. Tohyama, K. Imaizumi and T. Asano

Abstract

Studies of γ-Ray Induced Polymerization of Aqueous Acrylamide

M. M. Alam, F. Akthar, M. F. Mina, N. C. Dafader and A. I. Mustafa

Abstract

Crystallization of a low molecular weight Polyethylene and Paraffins under a Temperature Gradient

T. Asano, M. F. Mina, A. Nishida, S. Yoshida and Y. Fujiwara

Abstract

Crystallization of Oriented Amorphous Poly(ethylene terephthalate) as Revealed by X-Ray Diffraction and Microhardness

T. Asano, F. J. Balta Calleja, A. Flores, M. Tanigaki, M. F. Mina, C. Sawatari, H. Itagaki, H. Takahashi and I. Hatta

Abstract

The structural changes occurring when amorphous cold-drawn poly(ethylene terephthalate) films are annealed at different temperatures (50°C–240°C) for different annealing times (10–104 s) were investigated by means of X-ray diffraction and microhardness techniques. The X-ray results reveal the appearance of smectic order at 60°C with a period of 10.7 Å. At 70°C, a layer structure in the scale of 110 Å emerges. Finally, triclinic order is observed above 80°C. The appearance of a layer structure prior to the development of triclinic crystals is associated with a density difference along the molecular direction produced by a molecular tilting mechanism. The microhardness behaviour of annealed cold-drawn PET films is correlated to the developing morphologies. At high annealing temperatures (>100°C), the plastic component of hardness is shown to vary with the occurring microstructural changes. Results indicate that the hardness of the amorphous intrafibrilar regions is higher than that of a fully amorphous material. The indentation anisotropy, ΔH, which is related to the elastic recovery of the material shows a conspicuous decrease at Ta∽70°C, which is explained in terms of a relaxation of the fibrils in the chain direction.

Melting Behavior of the Oriented β-phase Polypropylene Texture Crystallized by the Temperature Slope Method

 T. Asano, Y. Yamamoto, M. F. Mina, Y. Fujiwara, H. Takahashi and I. Hatta

Abstract

Isotactic polypropylene consisting of uniaxially oriented P-phase lamellae was crystallized in a temperature gradient. The β → α transition was investigated by simultaneous measurements with differential scanning calorimetry (DSC) and X-ray diffraction using synchrotron radiation (SR). To compare the transition mechanism, the β-phase sample was deformed by rolling it along the direction of the crystallization. During rolling, the β-crystal is deformed by interlamellar and interchain slip, which induces c-axis-oriented molecules along the rolling direction. The melting behavior is changed by the rolling deformation. For the as-grown β-crystal, the DSC thermogram has three peaks: the β-melting endotherm at 150°C, an exotherm by recrystallization into the °-form, and the endotherm at 167°C caused by melting of the recrystallized α-form. After the rolling deformation, the β-endotherm is extinguished by the successive exotherm. Simultaneous X-ray measurements reveal that the β → α transition is shifted to a lower temperature and that the recrystallized α-form has a c-axis-orientation caused by the rolling deformation. In the process of the β→ α transition, higher-order lamellar structure is developed earlier than formation of the crystalline structure. In this study, the heating phenomena, such as the β α transition and thickening of the β- and α-lamellae, are consistently explained by a mechanism involving melting and subsequent recrystallization.

Effect of Homologous Impurity on the Solid-Solid Phase Transition of Normal-Alkane (Hexatriacontane) Crystal Studied by Time-Resolved X-Ray Measurements

M. F. Mina, T. Asano, R. Nuryadi, C. Sawatari, H. Takahashi and I. Hatta

Abstract

Dynamic Investigation of the Solid-Solid Phase Transition of Normal-Alkane (Hexatriacontane) by Simultaneous Measurement with Differential Scanning Calorimetry, Small-Angle X-ray Scattering and X-ray Television Detector

M. F. Mina, T. Asano, H. Takahashi, I. Hatta, K. Ito and Y. Amemiya

Abstract

Simultaneous measurements have been performed using differential scanning calorimetry, time-resolved small-angle X-ray scattering and X-ray television (TV) methods to study the solid-solid phase transition of the normal-alkane (hexatriacontane) single crystal. The low-temperature monoclinic form (M L) of hexatriacontane transforms to the high-temperature monoclinic form (MH) by two mechanisms. One mechanism is a direct transition from M L to M H by twin formation without passing any activated state. The other mechanism is a two-step transition through an intermediate orthorhombic state (O), where the molecules stand up from the M L state and then re-incline into the M H state. The subsecond time-resolved investigation by simultaneous measurements reveals dynamic variations during the transition. The former M L→M H transition appears at a lower temperature showing that twin formation requires lower energy, than the two-step process with the activated state. Continuous changing of intensities observed in the X-ray TV indicates that the latter M L→O→M H transition is caused by the coherent motion of the molecules.

Twin Formation Mechanism in the Solid-Solid Phase Transition of Normal Hexatriacontane (n-C36H74) 

T. Asano, M. F. Mina and I. Hatta

Abstract

Solid-solid phase transition of -C 36 74 was investigated by DSC and X-ray diffraction methods. In the original monoclinic single crystal, molecular chains inclined about 27° in the bc -plane from the normal to the lamellar surface. During the transition started from 72°C and completed at 73.4°C, two kinds of mechanisms were observed in the formation of a high temperature monoclinic structure having the molecules inclined about 19° in the ac -plane. One mechanism was due to formation of twinned crystals where the transition was developed on the frontier of the (110) twin boundary. The twin formation was achieved by rotation of the molecular zigzag plane producing the new crystalline -axis deviated by 67° from the original orientation. The other mechanism was attained by changing the molecular staggering by 90° where the crystalline axis was unchanged. In the solid-solid transition, the two mechanisms appeared simultaneously, resulting in the appearance of polycrystals.

Synthesis, characterization and antimicrobial performances of copper nanoparticles

M. N. K. Chowdhury, M. D. H. Beg and M. M. R. Khan, M. F. Mina

Abstract

Effect of Alkali and Simultaneous Ultrasound-Alkali treatments on the Performances of Oil Pump Empty Fruit Bunch Fibers

M. F. Mina, A. K. M. M. Alam, M. D. H. Beg and R. M. Yunus

Abstract

Structure and proeprties of injection-molded isotactic polypropylene and multi-walled carbon nanotubes composites

M. A. Haque, M. K. H. Bhuiyan, M. F. Mina, M. A. Gafur, Y. tamba and T Asano

Abstract

Determinacion del estado de orientacion en compuestos de PE con fibras de celulosa mediante medidas de microdureza

C. Fonseca, A. Ochoa, C. Gonzalez, P. Cardin, M. F. Mina and F. Ania

Abstract

Space Resolved X-ray Diffraction Measurements of the Supercooled State of Polymers

T. Asano, S. Yoshida, A. Nishida, and M. F. Mina

Abstract

Influence of Silane Coupling Agents of Different Functionalities on the Performance of Jute-Polycarbonate Composite

M. A. Khan, M. F. Mina and L. T. Drzal

Abstract

Physics Part I and II, Text Books for Higher Secondary Education, Approved by NCTB

T. Asano, M. F. Mina and Y. Fujiwara

Abstract

The Use of Oil Palm Biomass (OPB) Fibers as reinforcement in Composites", In: Biofiber reinforcements in composite materials, Ed. Omar Faruk and Mohini Sain, UK, Woodhead Publishing Limited

M. D. H. Beg, M. F. Mina, R. M. Yunus and A. K. M. Moshiul Alam

Abstract

A Survey of Polymer Crystallization by X-ray Diffraction,

T. Asano, M. F. Mina and Y. Fujiwara

Abstract

Copper nanoparticles reinforced firbres and method of formation thereof

Maksudur R. Khan, M. D. H. Beg, M. N. K. Chowdhury, M. F. Mina and R. M. Yunus

Abstract

Natural fibers reinforced polyester resin composites and method of formation thereof

M. D. H. Beg, Maksudur R. Khan, R. M. Yunus, M. F. Mina and A. K. M. M. Alam

Abstract

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