Properties of low-density polyethylene/natural rubber/water hyacinth fiber composites: the effect of alkaline treatment

2015 ◽  
Vol 73 (2) ◽  
pp. 539-557 ◽  
Author(s):  
S. J. Tan ◽  
A. G. Supri
Keyword(s):  
Natural Rubber ◽  
Water Hyacinth ◽  
Alkaline Treatment ◽  
Fiber Composites ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Water Hyacinth Fiber

Mechanical Properties, Swelling Behavior and Morphology Properties of Dynamic Vulcanized Low Density Polyethylene/Natural Rubber/Water Hyacinth Fibers Composites

2014 ◽  
Vol 679 ◽  
pp. 184-188
Author(s):  
Soo Jin Tan ◽  
A.G. Supri
Keyword(s):  
Natural Rubber ◽  
Water Hyacinth ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Rotor Speed ◽  
Dynamic Vulcanization ◽  
Elongation At Break ◽  
Fiber Loading ◽  
Lower Molar

The effect of dynamic vulcanization and fiber loading on properties of low density polyethylene (LDPE)/natural rubber (NR)/water hyacinth fibers (WHF) were investigated. In this study, the vulcanized thermoplastics were obtained by in situ dynamic curing of LDPE/NR/WHF composites. The LDPE/NR/WHF composites with different fiber loading were prepared by using Brabender mixer at 180 °C with the rotor speed of 50 rpm. The results showed that dynamic vulcanized LDPE/NR/WHF composites gave a higher tensile strength, Young’s modulus, elongation at break but lower molar sorption than unvulcanized LDPE/NR/WHF composites. The SEM micrographs also displayed better fibers dispersion and the crosslink formation in dynamic vulcanized LDPE/NR/WHF composites indicated better interfacial bonding among fibers and matrix compared to unvulcanized LDPE/NR/WHF composites.

Effect of Epoxide Group in Thermoplastic Elastomer on the Properties of Polyamide6 and Low-Density Polyethylene Blends

2014 ◽  
Vol 979 ◽  
pp. 143-146 ◽  
Author(s):  
Surakit Tuampoemsab ◽  
Saad Riyajan ◽  
Thritima Sritapunya ◽  
Pornsri Pakeyangkoon
Keyword(s):  
Impact Strength ◽  
Natural Rubber ◽  
Shear Viscosity ◽  
Thermoplastic Elastomer ◽  
Phase Morphology ◽  
Epoxidized Natural Rubber ◽  
Low Density Polyethylene ◽  
Dispersed Phase ◽  
Low Density ◽  
Epoxide Group

Studies on the effect of percentages of epoxide group in thermoplastic elastomer as a compatibilizer on properties of polyamide6 (PA6) and low-density polyethylene (LDPE) blends was successfully carried out in this study. Thermoplastic epoxidized natural rubber (TPENR), made from epoxidized natural rubber (ENR) and LDPE, prepared from 3 types of ENR, i.e., ENR-20, ENR-50 and ENR-70, with the ratio of 90/10 of LDPE/ENR by weight. TPENR was applied as a compatibilizer into the blend of PA6/LDPE/TPENR at the ratio by weight of 80/20/1 by using a twin screw extruder at 235°C. All test specimens were characterized for phase morphology, impact strength and rheological behaviour. Results exhibited that phase morphology of PA6/LDPE blend was incompatible. The addition of TPENR improved the compatibility of PA6/LDPE blends. With inclusion of TPENR-20 as a compatibilizer, the uniformity and the maximum reduction of dispersed phase sized were observed. Moreover, it was revealed that the rheological properties such as shear viscosity increased when compared with PA6/LDPE incompatible blend. In addition, it was found that the highest shear viscosity and also the highest impact strength were obtained for the blend of PA6/LDPE compatibilized by TPENR-20. This result was further supported by SEM images, which showed that the smallest dispersed phase size occurred when a TPENR-20 was used as a compatibilizer. So, it was clearly demonstrated in this study that the suitable type of TPENR, i.e., TPENR-20, has an effect on improving phase morphology and properties of PA6/LDPE blends.

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