改性聚乙烯醇(WR-14)对聚醋酸乙烯酯乳液性能的影响  

Influences of modified PVA(WR-14)on properties of PVAc emulsion

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

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

出　　处：《中国胶粘剂》2015年第2期1-5,共5页China Adhesives

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

摘　　要：以WR-14[乙酰乙酰化改性PVA（聚乙烯醇）]作为保护胶体,制备了耐水PVAc（聚醋酸乙烯酯）乳液,考察了WR-14掺量对PVAc乳液性能的影响。研究结果表明：当m（PVA）∶m（VAc）=（7～9）∶100时,相应乳液具有相对最好的储存稳定性;乳液黏度随PVA掺量增加而提高,并且WR-14与其他适宜类型的PVA复配使用后,能有效调节乳液的黏度;聚合过程中乳液粒径从200 nm左右增至1 400 nm左右,WR-14能有效降低PVAc胶膜的吸水率;PVAc胶接件经常温水浸泡4 d、沸水蒸煮6 h后的湿态粘接强度均随WR-14掺量增加而增大,并且在m（WR-14）∶m（总PVA）=2∶4时分别为2.8、0.9 MPa。A PVAc （polyvinyl acetate） emulsion with water resistance was prepared by WR- 14[acetyl acetylation modified PVA （polyvinyl alcohol）] as protective colloid, and the influences of WR-14 contents on properties of PVAc emulsion were investigated. The research results showed that the corresponding emulsion has the relatively best storage stability when mass fraction of m （PVA） ： m （VAc） was （7- 9） ： 100. The emulsion viscosity was increased with increasing PVA contents, and the blend between WR-14 and other suitable types PVA could effectively regulate the emulsion viscosity. The emulsion particle sizes in polymerization process were increased from about 200 nm to about 1 400 nm, and W-R-14 could effectively reduce the water absorption of PVAc film. The wet bonding strengths of PVAc glued joints, which were treated by 4 d in water（room temperature） or 6 h in boiling water, were increased with increasing WR-.14 contents, and both were 2.8,0.9 MPa respectively when mass ratio of m（WR-14） ：re（total PVA） was 2：4.

关 键 词：聚乙烯醇 聚醋酸乙烯酯 乳液 胶粘剂 耐水性 

分 类 号：TQ433.433[化学工程]