摘要
以马来酸酐化聚丁二烯(MLPB)作为交联改性助剂,通过半连续种子乳液聚合工艺制备了MLPB改性丙烯酸酯乳液压敏胶(PSA)。研究了聚合体系的反应机理、不同用量的MLPB对乳胶膜耐水性能、热稳定性能和粘接性能的影响,并对其结构进行表征。结果表明,当MLPB质量分数为5%时,乳胶膜的粘接性能和耐水性能最佳,此时吸水率为2.86%;红外光谱(FTIR)结果表明,丙烯酸酯乳液在改性过程当中发生了共聚交联反应;接触角测量仪(CA)显示,当MLPB的质量分数为5%时,乳胶膜的水接触角达到最大值,为108°;差示扫描量热分析法(DSC)结果论证,改性后聚合物体系相容性好,且乳胶膜的Tg随着MLPB质量分数的增加逐渐升高;热重分析(TGA)结果表明,MLPB改性后的乳胶膜具备较高的热稳定性。
Maletic anhydride grafted liquid polybutadiene （MLPB） modified acrylate latex pressure sensitive adhesive （PSA） was synthesized via seed semicontinuous emulsion polymerization, using MLPB as crosslinking modification additives. The reaction mechanism of polymerization system, the influences of the MLPB content on the water resistance , thermal stability and adhesive properties of latex film were respectively investigated. The structure of modified acrylate latex was then characterized. The results showed that the latex with w（MLPB） =5% make the latex film possess the best adhesive performance and water resistance;which the water absorption of latex film was 2. 86% ;the results of fourier transform infrared spectra（FFIR） indicated that it appears the copolymerization crosslinking reaction during the process of latex modification;the results of contact angle meter（CA） showed that the contact angle of latex film with w （MLPB） = 5% reaches to the maximum which is 108°;the results of differential scanning calorimetry（DSC） revealed that the compatibility of the modified polymer system is well and the Ts of the latex film is gradually raised as the increase of MLPB content; the results of thermogravimetric analysis （TGA） demonstrated that the modified latex film show better thermal stability.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2016年第4期475-480,共6页
Fine Chemicals
基金
江苏省高校优势学科建设工程资助项目~~
