【摘要】 本实验合成了一系列含p 苯磺酸异丙酯基亲和性变化的二元、三元共聚物,并对其结构、聚合特征f1 F1曲线以及热分解性能进行了研究.对共聚物的DSC测试发现,随着p 苯磺酸异丙酯基含量的增加,树脂中磺酸酯基的分解温度向低温方向移动,范围在120—170℃;而磺酸酯基的分解能量随其在树脂中含量的增加而升高,范围在20—30kJ/mol.动力学研究结果显示,聚合物中磺酸酯基的热分解过程属于自加速类型,反映了热分解产生的磺酸对磺酸异丙酯热分解过程的催化作用.加热分解后树脂水溶性的研究表明,在二元共聚物中磺酸酯基单元含量等于或大于27%,在引入羧酸基的三元共聚物中磺酸酯基单元含量为21%时,热分解后共聚物涂层表现出优良的水溶性,能够在中性水中快速、彻底溶解并脱离支持版基.更多还原

【Abstract】 A series of bipolymers and terpolymers bearing isopropyl pstyrenesulfonate group in the side chain were synthesized and their structures,f1F1 curves and thermolysis properties were investigated.DSC data showed that with the increase of sulfonate unit in content,its thermodecomposition temperature decreased from 170 ℃ to 120 ℃,while its thermodecomposition energy increased from 20 kJ/mol to 30 kJ/mol.This low energy range indicated that the sulfonate group studied in this work should be attributed to ester groups of low decomposition energy for acid protection.Kinetics studies revealed that thermodecomposition of the sulfonate group was an autoaccelerated process,in which decomposition of the sulfonate group was accelerated by its corresponding acid released during the decomposition process.It was found that aqueous solubility of the copolymers was strongly dependent on content of the sulfonate group.After baking treatment,bipolymers containing 27% mol or more sulfonate group were highly soluble in neutral water,while terpolymers of 21% mol sulfonate group with another 28% mol acrylic acid as the third component became highly soluble in neutral water. This result indicated that addition of acrylic acid as third component to the copolymer could effectively reduced the content of sulfonate group necessary for achieving excellent aqueous solubility after thermodecomposition,leading to pronounced changes in affinity by less thermal energy and ultimately to high sensitivity.更多还原