低固含量聚醋酸乙烯乳液黏度影响因素研究  

Study on viscosity influence factors for PVAc emulsion with lower solid content

作　　者：毛国琪[1] 顾继友[1] 刘海英[1] 张俊[1] 

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《中国胶粘剂》2009年第9期1-4,共4页China Adhesives

基　　金：哈尔滨市攻关项目(2008AA4BG006)

摘　　要：采用半连续种子乳液聚合法制备了固含量为20%的聚醋酸乙烯(PVAC)乳液,探讨了保护胶体聚乙烯醇(PVA)用量、共聚单体、加料方式及轻质碳酸钙(CaCO_3)用量对该乳液黏度的影响。结果表明:随着PVA用量的增加,乳液黏度提高;共聚单体的种类对乳液黏度有一定的影响;乳液黏度随种子单体用量的增加而降低;加入轻质CaCO_3后,乳液的黏度增加数倍。合成乳液的固含量为18.04%,黏度为5 570 mPa·s。A polyvinyl acetate（PVAc） emulsion with 20% solid content was synthesized by semi-continuous seeded emulsion polymerization.The influences of PVA （polyvinyl alcohol） contents,monomers of copolymer, charging wise and light CaCO3 contents were discussed on emulsion viscosity.The results showed that the emulsion viscosity was enhanced with increase of PVA contents.The monomer types of copolymer had certain influence on emulsion viscosity.The emulsion viscosity was reduced with increase of seeded monomer contents.The emulsion viscosity was increased by several times when light CaCO3 was introduced in systems.The solid content was 18.04% and viscosity was 5 570 mPa·s for synthesized emulsion.

关 键 词：聚醋酸乙烯 乳液 胶粘剂 黏度 固含量 

分 类 号：TQ433.433[化学工程]