摘要
讨论了用臭氧氧化法对聚丙烯表面进行涂装性改良时,聚丙烯均聚物、乙烯-丙烯嵌段共聚物及无规共聚物表面的臭氧氧化反应过程。ATR-IR、ESCA及SEM的结果表明,3种聚丙烯有相同的反应过程,即臭氧氧化反应首先使材料表面的聚丙烯部分生成PP-OH和PP-C=CH,然后-C=C-被臭氧氧化分解生成酮、醛或羧基等,最终氧化产物以羧基为主。臭氧氧化主要发生在处于材料表面非晶态中的丙烯叔H部分上。但由于臭氧对聚丙烯及其共聚物表面的攻击方式不同,溶剂洗净后3种聚丙烯状态将有很大的差异。
In the present paper, the ozonization reaction processes of homopolymer of propylene and block and radom copolymers of propylene and ethylene have been investigated during the experiments of improving the coating properties of their surfaces by ozonization treatment. It has been indicated by results of ATR-IR, ESCA and SEM that all the three kinds of the polymers had the same ozonization process, namely, PP -OH and PP -C = CH were formed initially in the propylene parts on the material surfaces with ozonization reaction, and then - C = C- were oxidized by ozone and decomposed into acetone, aldehyde and carboxyl groups. The final oxidation products were mainly carboxyl groups. Ozonization mostly occurred at the site of tertiary H of propylene on amorphous parts of the material surfaces. Due to the different attack forms of ozone to the three kinds of the polymers, the surface states of the polymers were different after solvent washing.
出处
《合成树脂及塑料》
CAS
1996年第4期11-15,共5页
China Synthetic Resin and Plastics
关键词
聚丙烯
共聚物
臭氧
氧化
改性
涂装性
polypropylene
copolymer of propylene and ethylene
surface
ozonization
