以端乙烯基硅氧烷化合物（VTES）为自交联单体,聚乙烯醇为高分子胶体保护剂,丙烯酰胺（AM）、苯乙烯（St）和丙烯酸丁酯（BA）为原料,通过无皂乳液共聚合制备自交联苯乙烯-丙烯酸树脂表面施胶剂,m（VTES）=5.0%,m（AM）=20%时,自交联苯丙乳液具有优异的施胶和表面增强效果,当以质量分数为0.2%的聚合物乳液和5.0%氧化淀粉复配进行表面施胶时,纸张施胶度可达66s,耐折度15次,拉毛速度最大为3.8s。通过红外光谱（IR）和透射电镜（TEM）对杂化材料进行表征,结果表明乳胶膜产生了Si—O—Si交联网络,VTES加入不会导致乳液粒径增大。
Self-crosslinkable styrene-acrylic copolymers were successfully prepared by soap-free emulsion polymerization,using vinyltriethoxysilane as acrosslinking agent and polyvinyl alcohol（PVA） as polymeric colloid stabilizer.The synthetic process was optimized.According to the application results,the optimum reaction conditions were described as below：m（AM）=20%,m（VTES） =5%.Moreover,the applied properties of the sized paper were measured as follows when the dosage of the surface sizing agent was 0.2% self-crosslinkable styrene-acrylic copolymers and 5.0% oxidation starch： the sizing value can reach 66s,picking velocity can reach 3.8s and folding endurance 15 was times.The self-crosslinkable styrene-acrylic copolymere were characterized by FT-IR and TEM,the results indicated the formation of Si—O—Si of membranes and the incorporation of VTES did not increase the size of emulsion.
参考文献
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