Abstract: By solid-phase mechanochemical reaction,waste rigid polyurethane foam (WRPUF) was pulverized to activated powder (WRPUFP) at normal temperature.WRPUFP was surface modified by heat-force retrocrosslinking reaction (MWRPUFP),using tetraethylene pentamine (TEPA) as retrocrosslinking agent.The reinforced NBR was prepared by compression molding,when MWRPUFP used as intensifier,NBR-g-MAH which was produced with maleic anhydride (MAH) and nitrile rubber (NBR) through the graft reaction under the initiation of dicumyl peroxide (DCP) used as compatibilizer.The effects of dosages of TEPA,MAH,DCP and MWRPUF to the reinforced NBR were investigated.The results showed that the reinforced NBR with better comprehensive property was obtained,when TEPA content was 5wt% (relative to MWRPUFP),the dosages of MAH,DCP and MWRPUF were 3.5phr,0.75phr and 20phr separately,i.e.the shore A hardness of reinforced NBR was 59,the tensile strength was 8.61MPa,the elongation at break was 1723%,and the tear strength was 28kN/m.The scanning electron microscopy (SEM) photos on the tear section of reinforced NBR showed that the generated NBR-g-MAH under the action of heat-force could improve the compatibility of MWRPUFP and NBR,so as to improve the mechanical property of NBR.
陈晓松, 熊煦, 周慧, 马立波. 废弃硬质聚氨酯泡沫塑料填充增强丁腈橡胶的研究[J]. 化工新型材料, 2018, 46(7): 262-265.
Chen Xiaosong, Xiong Xu, Zhou Hui, Ma Libo. Study on NBR filled and reinforced with waste rigid polyurethane foam. New Chemical Materials, 2018, 46(7): 262-265.