橡胶技术展特辑：橡胶共混理论的发展

2021-09-11

伴随着国际橡胶工业的高速增长，橡胶技术展现已汇集展商700余家，展览面积达50,000平方米，展商来自世界近30个国家和地区，集橡胶机械设备、橡胶化学品、橡胶原材料、轮胎和非轮胎橡胶制品、橡胶循环利用为一体，是橡胶行业相关企业各个环节操作者的年度盛会。今天就由橡胶技术展小编给大家详细介绍：橡胶共混改性技术的知识。

橡胶共混改性技术的成功开发，不仅有重大的实用意义，也有重大的理论意义。橡胶共混的理论是伴随着共混的实践过程应运而生。这些理论虽然还处于不断发展和完善的过程，却已在生产实践中显示出重要的指导作用。概括说来这些理论有：①聚合物相容性理论；②橡胶制品共混物的结构形态理论；③橡胶共混物中组分聚合物的共交联理论；©橡塑共混型TPE的理论。

橡胶制品共混的实施方法和共混改性的进展按照共混时橡胶和合成树脂所处的状态，有下述三种共混方法：熔融共馄、孚L液共混合溶液共混。熔融共混是将合成橡胶或合成树脂加热到熔融状态后实施混合的方法。熔融和混合是在炼胶机或挤出机中进行，这是工业生产中普遍应用的方法。孚L液共混是将聚合物以乳液状态混合的方法，如NBR/PVC共混物。

近年来借助与低分子化合物或低聚物共混，实现橡胶改性的研究，越来越受到重视。这些低分子化合物或低聚物普遍含有活泼的反应性原子或基团，这些原子或基团能在共混过程中或共混物的硫化过程中与橡胶大分子发生接枝、嵌段共聚反应或交联反应，从而起到对橡胶改性作用。橡胶的这种共混改性称为反应性^^混改性。橡胶与低分子或低聚物共混，不仅能改善橡胶的力学强度，也能改善其他性能，如天然橡胶与马来酸酐共混，生成天然橡胶的马来酸酐接枝共聚物，使其硫化胶的定伸应力提高10倍以上，耐动态疲劳弯曲次数提髙近三个数量级，耐热老化性也显著改善。又如低聚丙烯酸酯与丁腈橡胶共混，在引发剂存在下前者能与后者发生交联反应，不仅显著提高了丁腈硫化胶的力学强度，还改善了丁腈胶与金属的黏合强度。

低分子花呵护或低聚物与橡胶制品进行翻译性共混改性，是对非反应性改性技术的补充，随着许多低分子化合物和低聚物的商品化，这项改性技术的应用前景被十分看好。

看完了以上的内容，想必您一定很想去了解更多这方面的内容吧？请移步到橡胶技术展，2021年10月20-22日即将在国家会展中心（上海）开展，更多精彩的资讯等你来看！橡胶技术展期待您的到来。

热门新闻

人工智能预测胶料物性

全球天胶供应步入季节性低产期

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