Mechanical properties, thermal, and crystallization behavior of polypropylene composites reinforced by starch and wasted cotton cloth

2011 ◽  
Vol 123 (1) ◽  
pp. 562-570 ◽  
Author(s):  
Xiuju Zhang ◽  
Huajun Yang ◽  
Tingting Yang ◽  
Zhidan Lin ◽  
Shaozao Tan
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Cotton Cloth ◽  
Polypropylene Composites

Crystallization Behavior and Mechanical Properties of Nanosilica-Reinforced Isotactic Polypropylene Composites

2015 ◽  
Vol 30 (5) ◽  
pp. 542-547
Author(s):  
J. Li ◽  
L.-J. Long ◽  
W.-T. He ◽  
K. Zhang ◽  
Y.-S. Xiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Isotactic Polypropylene ◽  
Crystallization Behavior ◽  
Polypropylene Composites

scholarly journals Relationship between the Stereocomplex Crystallization Behavior and Mechanical Properties of PLLA/PDLA Blends

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1851
Author(s):  
Hye-Seon Park ◽  
Chang-Kook Hong
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Crystallization Behavior ◽  
Mechanical Analysis ◽  
X Ray Diffraction ◽  
Nucleation Agent ◽  
Scanning Calorimetry ◽  
Nucleation Sites ◽  
Wide Range ◽  
Degree Of Crystallization

Poly (l-lactic acid) (PLLA) is a promising biomedical polymer material with a wide range of applications. The diverse enantiomeric forms of PLLA provide great opportunities for thermal and mechanical enhancement through stereocomplex formation. The addition of poly (d-lactic acid) (PDLA) as a nucleation agent and the formation of stereocomplex crystallization (SC) have been proven to be an effective method to improve the crystallization and mechanical properties of the PLLA. In this study, PLLA was blended with different amounts of PDLA through a melt blending process and their properties were calculated. The effect of the PDLA on the crystallization behavior, thermal, and mechanical properties of PLLA were investigated systematically by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), polarized optical microscopy (POM), dynamic mechanical analysis (DMA), and tensile test. Based on our findings, SC formed easily when PDLA content was increased, and acts as nucleation sites. Both SC and homo crystals (HC) were observed in the PLLA/PDLA blends. As the content of PDLA increased, the degree of crystallization increased, and the mechanical strength also increased.

Influence of surface treatments and coupling agents on the thermal and thermo‐mechanical properties of yerba mate/post‐consumer polypropylene composites

2021 ◽  
Author(s):  
Betina Hansen ◽  
Cleide Borsoi ◽  
Ruan Ezequiel Gemmer ◽  
Marcos Aurélio Dahlem Júnior ◽  
Ademir José Zattera ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Treatments ◽  
Coupling Agents ◽  
Yerba Mate ◽  
Polypropylene Composites

scholarly journals Improving the mechanical properties of polypropylene composites with coconut shell particles

2021 ◽  
Vol 30 ◽  
pp. 263498332110074
Author(s):  
Henry C Obasi ◽  
Uchechi C Mark ◽  
Udochukwu Mark
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Flexural Modulus ◽  
Filler Particle ◽  
Tensile Modulus ◽  
Coconut Shell ◽  
Polypropylene Composites ◽  
Increase With Increase ◽  
Pp Composites ◽  
Shell Particles

Conventional inorganic fillers are widely used as fillers for polymer-based composites. Though, their processing difficulties and cost have demanded the quest for credible alternatives of organic origin like coconut shell fillers. Dried shells of coconut were burnt, ground, and sifted to sizes of 63, 150, 300, and 425 µm. The ground coconut shell particles (CSP) were used as a filler to prepare polypropylene (PP) composites at filler contents of 0% to 40% via injection melt blending process to produce PP composite sheets. The effect of the filler particle size on the mechanical properties was investigated. The decrease in the size of filler (CSP) was found to improve the yield strength, tensile strength, tensile modulus, flexural strength, flexural modulus, and hardness of PP by 8.5 MPa, 15.75 MPa, 1.72 GPa, 7.5 MPa, 100 MPa, and 10.5 HR for 63 µm at 40%, respectively. However, the elongation at break and modulus of resilience of the PP composites were seen to increase with increase in the filler size. Scanning electron microscope analysis showed that fillers with 63 µm particle size had the best distribution and interaction with the PP matrix resulting in enhanced properties.

Crystallization and Mechanical Properties of Glass Fiber Reinforced Polypropylene Composites Molded by Rapid Heat Cycle Molding

2020 ◽  
Vol 21 (12) ◽  
pp. 2915-2926
Author(s):  
Aimin Zhang ◽  
Guoqun Zhao ◽  
Jialong Chai ◽  
Junji Hou ◽  
Chunxia Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Fiber Reinforced ◽  
Heat Cycle ◽  
Polypropylene Composites ◽  
Glass Fiber Reinforced

Investigation of the Mechanical Properties of Bagasse Flour/Polypropylene Composites

2013 ◽  
Vol 49 (4) ◽  
pp. 447-454 ◽  
Author(s):  
A. Samariha ◽  
A. Bastani ◽  
M. Nemati ◽  
M. Kiaei ◽  
H. Nosrati ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polypropylene Composites ◽  
Bagasse Flour

scholarly journals Improvement of Mechanical Properties of Noil Hemp Fiber Reinforced Polypropylene Composites by Resin Modification and Fiber Treatment

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Zili Yan ◽  
Jianchun Zhang ◽  
Hua Zhang ◽  
Hao Wang
Keyword(s):  
Mechanical Properties ◽  
Mechanical Analysis ◽  
Interfacial Bonding ◽  
Hydroxyethyl Cellulose ◽  
Hemp Fiber ◽  
Polypropylene Composites ◽  
Hydrophobically Modified ◽  
Fiber Treatment ◽  
Fibre Treatment ◽  
Adhesion Factor

The present study aims to improve the reinforcement of hemp fibre to polypropylene (PP) by simple resin modification and fibre treatment. Maleic anhydride grafted polypropylene (MAPP) was used as resin modifier by direct mixing with PP, and hydrophobically modified hydroxyethyl cellulose (HMHEC) was used as fibre treatment reagent by immersing fibre into its aqueous solution. The influences of fibre content, resin modification, and fibre treatment on the mechanical properties (tensile, flexural, and impact strengths) of composites were investigated. The change of interfacial bonding between fibre and resin in composites caused by MAPP and HMHEC was studied by scanning electron microscopy and dynamic mechanical analysis. Resin modification and fibre treatment were effective to enhance the mechanical properties of the composites. The improvement in interfacial bonding is quantitatively evaluated with adhesion factor.

Impact of the processing temperature on the crystallization behavior and mechanical properties of poly[R-3-hydroxybutyrate-co-(R-3-hydroxyvalerate)]

Polymer ◽  
2021 ◽  
pp. 123987
Author(s):  
Julie Bossu ◽  
Nicolas Le Moigne ◽  
Philippe Dieudonné-George ◽  
Loïc Dumazert ◽  
Valérie Guillard ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Processing Temperature
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