摘要
以废弃聚苯乙烯泡沫塑料(EPS)为原料、四氯乙烯/环己烷为混合溶剂、松香和SBS(苯乙烯-丁二烯-苯乙烯嵌段共聚物)为增黏剂,制备环保溶剂型EPS木材胶粘剂。重点探讨了不同热老化条件时EPS胶粘剂的性能变化规律。研究结果表明:混合溶剂的最佳配比是V(四氯乙烯)∶V(环己烷)=2∶1;EPS胶粘剂的最佳配方是样号5#[即m(EPS)∶m(松香)∶m(SBS)=100∶3∶12],其最终剪切强度(为6.60 MPa)相对最大,并且其耐热老化性能较好;在热环境中随着老化时间的延长,EPS胶粘剂的剪切强度基本上降低了,但EPS的分子结构没有发生改变;导致EPS胶粘剂粘接性能下降的主要原因是小分子增黏树脂的受热降解。
With waste EPS （polystyrene foam） as raw material, tetrachloroethylene/cyelohexane as mixed solvent, rosin and SBS（styrene-butadiene-styrene block copolymer） as tackifiers, an environment-friendly solvent- based EPS wood adhesive was prepared. The properties change law of EPS adhesive was emphatically discussed at different heat aging conditions. The research results showed that the optimal proportion of mixed solvent was obtained when the volume ratio of V（tetrachloroethylene） ： V（eyelohexane） was 2： 1. The optimal formula of EPS adhesive was sample 5[namely mass ratio of m（EPS） ： re（rosin） ： m（SBS）was 100： 3： 12], and its final shear strength （6.60 MPa） was relatively maximal, and it has the better heat aging resistance. The shear strength of EPS adhesive was basically decreased with increasing aging time in thermal environment, but the molecular structure of EPS was no changed. The main reason of bonding properties decrease of EPS adhesive caused by thermal degradation of micromoleeule taekifying resin.
出处
《中国胶粘剂》
CAS
北大核心
2014年第8期4-8,共5页
China Adhesives
基金
住房与城乡建设部项目资助(2012-K4-31)
沈阳建筑大学科研基金项目(2013132)
