Effect of blend ratio on the tear-fracture topography of low-density polyethylene—natural rubber blends

1986 ◽  
Vol 5 (4) ◽  
pp. 399-401 ◽  
Author(s):  
Sania Akhtar ◽  
Prajna P. De ◽  
Sadhan K. De
Keyword(s):  
Natural Rubber ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Blend Ratio ◽  
Rubber Blends ◽  
Fracture Topography

scholarly journals Diffusion Characteristics of Toluene into Natural Rubber/Linear Low Density Polyethylene Blends

2009 ◽  
Vol 2009 ◽  
pp. 1-6 ◽  
Author(s):  
Henry C. Obasi ◽  
Okoro Ogbobe ◽  
Isaac O. Igwe
Keyword(s):  
Natural Rubber ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Sorption Data ◽  
Blend Ratio ◽  
Polyethylene Blends ◽  
Diffusion Characteristics ◽  
Enthalpy Of Sorption ◽  
And Diffusion

The sorption and diffusion of toluene through blends of natural rubber (NR) and linear low density polyethylene (LLDPE) of varying compositions were studied at 35, 55, and65°Cby conventional weight-gain experiments. The effects of blend ratio on the diffusion, sorption, and permeation coefficients were determined. The sorption data were used to estimate the activation energies of diffusion and permeation, parameters which were found to show a decrease when the amount of NR or LLDPE was increased. The transport of toluene through most of the blends was anomalous, althouh at35°C, the transport of toluene through the 60/40 blend was Fickian and at35°C, pseudo-Fickian. The enthalpy of sorption of toluene obtained is positive and suggests a Henry's type sorption.

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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