氧化还原体系条件下耐水聚醋酸乙烯酯乳液的合成  

Synthesis of water-resistant polyvinyl acetate emulsion in redox system

作　　者：程增会[1,2,3,4] 林永超[5] 刘美红[1,2,3,4] 刘玉鹏[1,2,3,4] 王春鹏[1,2,3,4,6] 

机构地区：[1]中国林业科学研究院林产化学工业研究所 [2]生物质化学利用国家工程实验室 [3]国家林业局林产化学工程重点开放性实验室 [4]江苏省生物质能源与材料重点实验室,江苏南京210042 [5]南京理工大学化工学院,江苏南京210094 [6]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《粘接》2015年第3期39-42,共4页Adhesion

基　　金：中央级公益性科研院所基本科研业务费专项资金(CAFINT2010K04)

摘　　要：以改性聚乙烯醇(PVA)作为保护胶体,以双氧水(H O)/酒石酸(TA)氧化还原体系为引发剂制2 2备聚醋酸乙烯酯乳液。采用SEM、红外、DSC、DMA等对胶粘剂的转化率、形貌、结构等性能进行了测试;结果表明,聚醋酸乙烯酯乳液的转化率能达到99%以上,瞬时转化率也在80%以上。SEM显示其乳胶粒子平均粒径在1 000 nm左右;Al Cl的加入对PVAc膜结构无影响,加入成膜助剂使其玻璃化温度(T)降低;PVAc的T在32.63 g g℃左右,与DMA测试结果基本一致。The polyvinyl acetate latexes were prepared using modified polyvinyl alcohol （PVA） as the protective colloid, hydrogen peroxide （H2O2）/tartaric acid （TA） as the redox initiator. The conversion rate, morphology structure and other properties of the adhesives were investigated by scanning electron microscope （SEM）, FTIR, differential scanning calorimetry （DSC）,DMA,etc. The results showed that the conversion of vinyl acetate emulsion could reach over 99%, and the instantaneous conversion rate was above 80%; the average particle diameter of latex particles was about 1000nm; AlCl3 had no affect on PVAc film structure;the glass transition temperature（Tg） of film decreased when adding film-forming additives;the Tg of PVAc was about 32.6℃,consistent with the DMA result.

关 键 词：改性PVA 聚醋酸乙烯酯乳液(PVAc) 氧化还原引发剂 耐水 

分 类 号：TQ433.43[化学工程]