VAc/VoeVa/DAAM三元共聚乳液的制备与性能研究

Study on preparation and properties for VAc/VoeVa/DAAM ternary-copolymer emulsion

以VAE[醋酸乙烯酯(VAc)-乙烯共聚物]为种子乳液、聚乙烯醇(PVA)为保护胶体、叔碳酸乙烯酯(VoeVa10)为VAc的共聚单体、OP-10为乳化剂、己二酰肼(ADH)/双丙酮丙烯酰胺(DAAM)为交联体系和叔丁基过氧化氢/甲醛次硫酸钠为氧化还原型引发剂,采用种子乳液聚合法制备了VAc/VoeVa10/DAAM共聚乳液;然后在反应后期加入后交联剂(ADH),得到改性聚醋酸乙烯酯(PVAc)乳液。结果表明:当w(PVA1788+PVA1799)=3%、m(PVA1788)∶m(PVA1799)=1∶1、m(VoeVa10)∶m(VAc)=(10～15)∶100、w(氧化剂)=0.3%、w(VAE)=10%、w(OP-10)=2%、m(ADH)∶m(DAAM)=(0.5～1.5)∶1.0且w(DAAM)=2%时,相应乳液具有优异的耐水性和稳定性,并且其涂膜柔韧性和粘接性能俱佳。

With VAE [vinyl acetate （VAc）-ethylene copolymer] as a seed-emulsion, polyvinyl alcohol （PVA） as a protective colloid, vinyl versatate （VoeVa10） as a comonomer of VAc, OP-10 as an emulsifier,adipie dihydrazide （ADH）/diacetone aerylamide （DAAM） as a crosslinking system, tert-butyl hydrogen peroxide/sodium sulfoxylate formaldehyde as a redox initiator, a VAe/VoeVaI0/DAAM eopolymer emulsion was prepared by seed- emulsion polymerization, and then a modified PVAc （polyvinyl acetate ） emulsion was obtained by adding cross linker（ADH） in the reaction late. The results showed that the corresponding emulsion has excellent water resistance and stability,its film had good flexible and bonding properties when mass fraction of w（PVA1788＋PVA1799） was 3% and mass ratio of m（PVA1788）：m（PVA1799） was 1：1,mass ratios of m（VoeVa10）：m（VAc） and m（ADH）：m（DAAM） were （10-15）：100 and （0.5-1.5）：1.0 respectively,mass frations of VAE,oxidant,OP-10 and DAAM were 10% , 0.3% , 2% and 2% respectively.