Thermoplastic Elastomers Based on Ethylene-vinyl Acetate Copolymer and Waste Nitrile Butadiene Rubber Powder Blends Compatibilized by Chlorinated Polyethylene

2018 ◽  
Vol 57 (4) ◽  
pp. 305-316 ◽  
Author(s):  
Libin Wang ◽  
Lin Zhang ◽  
Yujiao Shi ◽  
Zhaobo Wang
Keyword(s):  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Thermoplastic Elastomers ◽  
Butadiene Rubber ◽  
Chlorinated Polyethylene ◽  
Rubber Powder ◽  
Nitrile Butadiene Rubber ◽  
Powder Blends ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

A novel heat-triggered shape-memory polymer based on ethylene–vinyl acetate copolymer/nitrile–butadiene rubber thermoplastic vulcanizates

2019 ◽  
Vol 33 (9) ◽  
pp. 1217-1233 ◽  
Author(s):  
Libin Wang ◽  
Kesi Xiong ◽  
Zhaobo Wang
Keyword(s):  
Shape Memory ◽  
Vinyl Acetate ◽  
Shape Memory Polymer ◽  
Weight Ratio ◽  
Ethylene Vinyl Acetate ◽  
Butadiene Rubber ◽  
Nitrile Butadiene Rubber ◽  
Thermoplastic Vulcanizates ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

Achieving considerable shape-memory effects is a challenge for typical sea-island structured polymer blends. In this article, we successfully fabricated a novel heat-triggered shape-memory polymer (HSMP) based on ethylene–vinyl acetate copolymer/nitrile–butadiene rubber (EVA/NBR) thermoplastic vulcanizates (TPVs) via dynamic vulcanization. The influence of deformation temperature ( Td), recovery temperature ( Tr), and recovery time on the shape-memory behavior of the EVA/NBR (weight ratio = 80/20) TPV was investigated systematically. The shape-memory result of the EVA/NBR (weight ratio = 80/20) TPV demonstrated that when the Td was close to the melting temperature ( Tm) of the EVA phase (76°C), the TPV could obtain a good shape fixity ratio (>95%) and an excellent shape recovery ratio (>95%) at 100% stretch ratio. A shape-memory mechanism was proposed for this HSMP. The dynamic mechanical analysis results under temperature sweep mode showed that with increasing EVA content in TPVs, the tan δ decreased, while the storage modulus increased. The morphology observation showed that the cross-linked NBR particles were dispersed evenly in the etched surface of EVA/NBR TPV with an average diameter of approximately 2–6 μm. The longitudinal stretching surface of the EVA/NBR TPV exhibited the banding-like texture microstructure during the stretching process.

Preparation and properties of ethylene-vinyl acetate copolymer-based blend foams

2020 ◽  
pp. 009524431990037
Author(s):  
Min Ji Kwon ◽  
Dae Hwi Lim ◽  
In Chul Choi ◽  
Hae-Won Kwon ◽  
Chang-Sik Ha
Keyword(s):  
Specific Gravity ◽  
Construction Industry ◽  
Vinyl Acetate ◽  
Dynamic Stiffness ◽  
Ethylene Vinyl Acetate ◽  
Thermoplastic Elastomers ◽  
Expansion Ratio ◽  
Key Factors ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

In this study, ethylene-vinyl acetate (EVA) copolymer-based blend foams with polyolefin elastomers (POEs), low-density polyethylene, or styrenic thermoplastic elastomers were prepared as a potential resilient material for reducing inter-floor noise. Various properties of EVA blend foams were measured in order to reveal the effects of EVA content and types of pair polymers consisting of EVA blend foams on dynamic stiffness, which is one of the key factors of resilient materials, in relation to hardness, specific gravity, and resilience. These properties had not been introduced by the construction industry until now. When the EVA/POE ratio was 20/80 and the foaming ratio was 210%, dynamic stiffness presented the lowest value at 5.97 MN m−3. However, when the resilience was <20%, dynamic stiffness was as high as 37.66 MN m−3 at an expansion ratio of 210% even when the specific gravity was low.

Properties of chlorinated polyethylene rubber/ethylene vinyl acetate copolymer blend-based foam

2011 ◽  
Vol 52 (1) ◽  
pp. 218-224 ◽  
Author(s):  
Bao Sheng Zhang ◽  
Zhen Xiu Zhang ◽  
Xiu Feng Lv ◽  
Bing Xue Lu ◽  
Zhen Xiang Xin
Keyword(s):  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Chlorinated Polyethylene ◽  
Copolymer Blend ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer
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