极性官能化SSBR/白炭黑湿法混合制备高性能弹性体及其结构与性能研究

The dispersion states of filler and its interaction with rubber are the two key problems to be solved to prepare safety, energy-saving high performance tire. In this research a novel reactive solution blending method is develop to prepare silica-reinforced rubber. The idea is based on both the anionic solution polymerization technology and the chemical interaction between the polar functional polymer and hydroxyl group of silica.The highly dispersion of silica in rubber and the strong interaction between them are achieved by combination with stong interaction（such as chemical bonding, H-bonding）and physical methods(such as high-speed stirring or ultrasonic agitation ) . The basic theoretical problems include as following: the control and characterization of high dispersibility of filler; the control and characterization of interaction between fillers and polymer; the effect of the former two factors on the rubber performances; the structure-performance relationship of silica-reinforced rubber. The models of rubber network at high dispersion state of silica is finally established and the energy-saving preparation method of nanoparticles reinforced rubber is developed. It is expected to be a break through in the field of design and preparation technology of novel high performance elastomer material.

弹性体复合材料中填料分散状态（降低填料网络的形成）、填料与橡胶之间的相互作用（提高相互作用）是制备安全-节能高性能橡胶必须解决的问题。课题以负离子聚合制备橡胶的溶液聚合工艺为基础，同时利用极性官能化聚合物与白炭黑表面羟基的反应性或强相互作用，开发一种白炭黑和橡胶混合新工艺- - 湿法混合。特点是结合化学和物理（如高速搅拌、超声、形成氢键等）作用实现白炭黑在橡胶中的高分散和填料与橡胶的强相互作用。研究工作的重点是：湿法混合工艺制备填料高分散弹性体的影响因素及规律；白炭黑高分散以及白炭黑与橡胶相互作用的控制、表征以及对弹性体复合材料性能的影响原理；所制备弹性体结构与性能关系。研究目标是在负离子合成橡胶中实现白炭黑高分散，制备一种填料分散均匀、填料与橡胶相互作用强的弹性体复合材料；开发一种节能/环保的弹性体制备新方法。预计在高性能弹性体复合材料设计理念及其制备工艺上实现突破。

弹性体复合材料中填料分散状态（降低填料网络的形成）、填料与橡胶之间的相互作用是制备安全-节能高性能橡胶必须解决的问题。课题以负离子聚合制备橡胶的溶液聚合工艺和负离子活性聚合物的反应性为基础，开发一种白炭黑和橡胶混合的节能新工艺——湿法混合。即在聚合物溶液中伴随着化学反应，通过高速搅拌或超声实现白炭黑在橡胶中的高分散和填料与橡胶的强相互作用。研究工作取得如下几个方面的成果：合成了多种端基官能化SSBR和链中极性官能化的SSBR；开发了官能化SSBR与白炭黑湿法混合新工艺，该工艺具有节能、环保等特点，同时能够充分提高白炭黑在橡胶基体中的分散。结构与性能研究表明，在白炭黑高分散的条件下能够更好地消除填料网络，从而使橡胶复合材料具有高湿滑和低滚阻性能。