醋酸乙烯酯与磨砂轮胎橡胶共混物的交联动力学

IF 1.4 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Elastomers and Plastics Pub Date : 2009-03-01 DOI:10.1177/0095244308095015

O. Bianchi, R. Fiorio, J. N. Martins, A. J. Zattera, C. H. Scuracchio, L. B. Canto

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引用次数: 28

摘要

在过氧化二氨基(DCP)作为交联剂的存在和不存在的情况下，制备了共聚物乙烯乙酸乙烯酯(EVA)和EVA与不同组成的磨胎橡胶(GTR)的共混物。通过振荡盘流变法(ODR)和差示扫描量热法(DSC)研究了交联动力学。发现交联动力学取决于EVA/GTR共混物中GTR的量;部分交联的GTR相作为物理屏障，减慢了EVA交联速率。此外，活化能(Ea)和反应阶数(n)值表明，交联反应并不局限于EVA本体，在EVA/GTR界面上也可能发生一定程度的交联反应。

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Crosslinking Kinetics of Blends of Ethylene Vinyl Acetate and Ground Tire Rubber

The copolymer ethylene vinyl acetate (EVA) and blends of EVA and ground tire rubber (GTR) with different compositions are prepared in the presence and absence of dicumyl peroxide (DCP) as a crosslinking agent. The crosslinking kinetics is investigated through oscillatory disc rheometry (ODR) and differential scanning calorimetry (DSC). The crosslinking kinetics is found to be dependent on the amount of GTR in the EVA/GTR blends; the partially crosslinked GTR phase acts as a physical barrier, slowing down the EVA crosslinking rate. Furthermore, activation energies (Ea) and reaction order (n) values suggest that the crosslinking reactions are not restricted to the EVA bulk, but can also occur to some extent at the EVA/GTR interface.

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来源期刊

Journal of Elastomers and Plastics 工程技术-材料科学：综合

CiteScore

3.30

自引率

5.90%

发文量

审稿时长

6 months

期刊介绍： The Journal of Elastomers and Plastics is a high quality peer-reviewed journal which publishes original research on the development and marketing of elastomers and plastics and the area in between where the characteristics of both extremes are apparent. The journal covers: advances in chemistry, processing, properties and applications; new information on thermoplastic elastomers, reinforced elastomers, natural rubbers, blends and alloys, and fillers and additives.