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共混型热塑性弹性体(TPV)具有独特的亚微观相畴形态,因而常温下呈橡胶的弹性,高温下又具有热塑性。本文对动态硫化法制备的丁晴橡胶/尼龙树脂(NBR/PA)TPv的形态和性能的关系进行了深入的研究。TEM观察结果表明,未硫化共混体含量多者呈连续相(图1、2),而动态硫化共混体PA皆为连续相,即使共混比达到NBR/PA=80/20时也是如此(图3),交联的NBR呈颗粒状分散于PA之中(图4～6)。分散相组分的体积份数决定粒子尺寸、分布和物性(图7):改变硫化剂量也会得到类似的结果。不同硫化体系会有不同的相畴形态,因而影响力学性能。若选择最佳共混比、硫化体系和用量,分散相粒径大小和分布均适中。目前,有关这方面的研究尚未见文献报道。另外,本文通过红外光谱(IR)测验断定,
Blends of thermoplastic elastomer (TPV) has a unique submicroscopic phase domain morphology, which at room temperature was rubber elasticity, high temperature and thermoplastic. In this paper, the relationship between the morphologies and properties of NBR / PA / TPV prepared by dynamic vulcanization has been studied in detail. The TEM observations showed that the unvulcanized blends were mostly in the continuous phase (Fig. 1,2), whereas the dynamic vulcanized blends PA were all continuous, even at blends of NBR / PA = 80/20 (Figure 3). The cross-linked NBR was dispersed in the form of granules in the PA (Figures 4 to 6). The volume fraction of dispersed phase components determines particle size, distribution, and physical properties (Figure 7). Changing the amount of vulcanizing agent yields similar results. Different curing system will have different phase domain morphology, thus affecting the mechanical properties. If you choose the best blending ratio, curing system and the amount of dispersed phase size and distribution are moderate. At present, there is no literature on this aspect. In addition, this article by infrared spectroscopy (IR) test concluded,