摘要
用乳液接枝聚合法合成了氯丁橡胶（OR）／甲基丙烯酸甲酯（MMA）接枝共聚物OR-g-MMA乳液;用凝聚法制备了粉末状PCR-g-MMA干胶，将其溶于甲苯中制备了胶粘剂。研究了CR／MMA接枝聚合反应条件对单体转化率的影响和PCR-g-MMA粒子在溶剂中的溶解速率及其胶粘剂的粘接性能。结果表明，在适宜的反应条件下，接枝体系的单体转化率接近100％。SEM分析表明．PCR-g-MMA粒子表面及内部存在许多宏观及微观孔洞，使产物易于洗涤、脱水和干燥．在溶剂中有极高的溶解速率．完全溶解时间为0．5～1h。仅为片状CR248完全溶解所需时间的1／10。PCR—g—MMA胶粘剂的粘接性能与CR／MMA乳液接枝聚合反应条件有关。用其粘合PVC人造革．其初粘力为20．4N／2．5cm，剥离强度为55N／2．5cm，与片状CR248／MMA溶液接枝制备所得的胶粘剂处于相同水平。
The graft copolymer latex of chloroprene rubber（CR）/methyl methacrylate（MMA） was prepared by emulsion graft polymerization and then powdered with coagulation method. The adhesive was obtained by dissolving PCR-g-MMA in toluene. The effects of reaction conditions on the conversion of MMA, PCR-g-MMA solution in toluene and adhesion of PCR-g-MMA adhesive were investigated. The results showed that under the optimum conditions, the conversion of MMA reached nearly 100%. SEM analysis showed that there were many macroscopical and microcosmic interspaces both outer and inner of the particles, which made it easier to be washed and dried. Under the same conditions for complete dissolve,30-60min needed for PCR-g-MMA was just as 1/10 as that for sheet CR248. The adhesion of PCR-g-MMA adhesive was influenced by the reaction conditions of CR/MMA emulsion graft polymerization. When sticked PCR-g-MMA adhesive to PVC artificial leathers, the original adhesion force and the peeling strength of the adhesive were 20.4N/2.5cm and 55 N/2. 5cm respectively, which were as good as that made by the sheet CR248/MMA in graft polymerization solution.
出处
《特种橡胶制品》
2006年第2期26-30,共5页
Special Purpose Rubber Products
作者简介
温翠珠（1982-），女，广东兴宁人。硕士研究生。
