摘要
采用裂解色谱/质谱-计算机联用技术,对聚丙烯酸丁酯(PBA)、丙烯酸丁酯/苯乙烯共聚物(PBA/St)、丙烯酸丁酯/醋酸乙烯共聚物(PBA/VA)三种乳液聚合物的热裂解产物进行了分析,其特征裂解碎片被检测,质谱定性可靠。结果表明,由于三种聚合物的组成和结构不同,其裂解机理亦不相同。PBA、PBA/St以解聚机理裂解,其主要特征裂解产物是聚合单体;而PBA/VA以断袭机理裂解,主要特征裂解产物为醋酸、苯、苯甲酸丁酯等,裂解产物中的二、三单光裂解碎片,还反映出三种聚合物的链段结构序列不同,即PBA中聚合单体以头-头、头-尾两种方式键接;PBA/St以头-头一种方式键接;PBA/VA以头-头方式键接为主,亦存在少数头-尾键接链段。
In this paper three acrylic latex have been studiedby pyrolysis gas chromatography-mass spectrome-try,they are poly (n-butyl acrylate) (PBA),n-butylacrylate-styrene(PBA /St) and n-butyl acrylatevinyl acetate(PBA/VA) copolymers.All of thecharacteristic pyrolysis products of these polymershave been identified.The difference in degradationmechanism for three polymers was due to the differ-ent composition and microstructure.The polymerchain structure sequence and bond type have beendiscussed.
出处
《涂料工业》
CAS
CSCD
北大核心
1993年第6期44-47,共4页
Paint & Coatings Industry
