scholarly journals The effect of draw ratio on the mechanical properties and crystalline structure of single polymer polypropylene composites

Polymer ◽  
2016 ◽  
Vol 91 ◽  
pp. 156-161 ◽  
Author(s):  
Richard J. Foster ◽  
Peter J. Hine ◽  
Ian M. Ward
2011 ◽  
Vol 217-218 ◽  
pp. 377-382
Author(s):  
Feng Lei Shen ◽  
Guo Qiang Chen ◽  
Jiang Zhong Ding ◽  
Ju Yan Dai ◽  
Xiu Feng Yu

The effect of draw ratio and take-up velocity on the structure and property of the ultra-fine denier PET full drawing yarn (PET-FDY) with monofilament linear density equal to 0.38dTex was studied in this paper. The crystalline structure and crystalline size were determined by XRD method and size was reduced with increase of draw ratio. The orientation of whole molecular chain was determined using sonic velocity method. The mechanical properties and boiling water shrinkage were also examined. Draw ratio had greater influence on the boiling water shrinkage than take-up velocity did.


2021 ◽  
Author(s):  
Betina Hansen ◽  
Cleide Borsoi ◽  
Ruan Ezequiel Gemmer ◽  
Marcos Aurélio Dahlem Júnior ◽  
Ademir José Zattera ◽  
...  

2021 ◽  
Vol 30 ◽  
pp. 263498332110074
Author(s):  
Henry C Obasi ◽  
Uchechi C Mark ◽  
Udochukwu Mark

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.


2020 ◽  
Vol 21 (12) ◽  
pp. 2915-2926
Author(s):  
Aimin Zhang ◽  
Guoqun Zhao ◽  
Jialong Chai ◽  
Junji Hou ◽  
Chunxia Yang ◽  
...  

2013 ◽  
Vol 49 (4) ◽  
pp. 447-454 ◽  
Author(s):  
A. Samariha ◽  
A. Bastani ◽  
M. Nemati ◽  
M. Kiaei ◽  
H. Nosrati ◽  
...  

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Zili Yan ◽  
Jianchun Zhang ◽  
Hua Zhang ◽  
Hao Wang

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.


2006 ◽  
Vol 102 (5) ◽  
pp. 4759-4763 ◽  
Author(s):  
Alinaghi Karimi ◽  
Saleh Nazari ◽  
Ismaeil Ghasemi ◽  
Mehdi Tajvidi ◽  
Ghanbar Ebrahimi

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