De-link处理时间对废胶粉制备热固性塑料结构与性能的影响  

Effect of De-link Treating Time on Structure and Properties of Thermosets Prepared by Scrap Rubber Powder

作　　者：方亮[1] 王益庆[1] 梁桂花[1] 张立群[1] 

机构地区：[1]北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室

出　　处：《特种橡胶制品》2007年第3期1-5,共5页Special Purpose Rubber Products

基　　金：国家自然科学基金项目(50603002)

摘　　要：利用废胶粉制备出一种高强度、高模量热固性塑料。ESEM观察发现,热固性塑料基体中残存有少量胶粉颗粒,且胶粉颗粒与基体界面处存在硫黄的梯度分布。材料力学性能与硬质橡胶近似并具有较好的缺口冲击强度。还考察了De-link处理时间对材料微观结构和力学性能的影响。研究表明,随着De-link处理时间的延长,初始废胶粉的交联密度下降,基体中残存的胶粉颗粒明显减少,材料拉伸强度和模量呈上升趋势,而缺口冲击强度降低并趋于稳定。A kind of thermosets with high strength and high modulus was prepared by scrap rubber powder. Some rubber powder existed in the matrix and the gradient distribution of sulfur occurred in the surface between rubber powder and matrix, shown in ESEM. The effect of De-link treating time on the structure and properties of the thermosets was estimated. The results showed that with the increase of De-link treating time ,the cross-linking density of the scrap rubber powder reduced, the rubber powder particles existed in the matrix decreased and the tensile strength and modulus of the materials improved. Meanwhile, the notched impact strength reduced then became stable.

关 键 词：废胶粉 热固性塑料 硬质橡胶 De—linkl梯度 

分 类 号：TQ320[化学工程—合成树脂塑料工业]