化工学报2012，Vol.63Issue(10)：3324-3329,6.DOI:10.3969/j.issn.0438-1157.2012.10.045
EA-AA共聚物增容的PVC-木质素共混物的热稳定性
Thermal stability of PVC-lignin blends miscibilized by poly (ethyl acrylate-co-acrylic acid)
刘飞跃 1许凯 2陈鸣才 2曹德榕1
作者信息
- 1. 华南理工大学化学与化工学院,广东广州510641
- 2. 中国科学院广州化学研究所,广东广州510650
- 折叠
摘要
Abstract
When it is added in poly (vinyl chloride) (PVC), lignin has the potential to improve the thermal stability of PVC due to its sterically hindered phenol structure. However the thermal stability of PVC-lignin blends is practically worse than that of PVC due to the poor miscibility between lignin and PVC. A novel method was adopted to improve the miscibility between lignin particles and PVC matrix in PVC-lignin blends. A copolyacrylate, poly (ethyl acrylate-co-acrylic acid) was prepared. Lignin was treated with the copolyacrylate, and blended with PVC. The results showed that the thermal stability of PVC-lignin blends was well improved after lignin was treated with the copolyacrylate. The temperature of onset decomposition was about 13℃ higher than that of control PVC and the temperature of rapidest decomposition was about 27℃ higher than that of control PVC. Microscopic morphology analysis confirmed that the miscibility between lignin and PVC matrix was well improved. The combination between hydroxyl of lignin and carboxyl of EA-AA copolymer and the smaller lignin particles in the blend weakened the dehydration of lignin. Therefore, the acceleration of lignin's dehydration on autocatalytic dehydrochlorination of PVC was retarded and the inhibition of lignin's sterically hindered phenol structure on the autocatalytic dehydrochlorination of PVC was strengthened.关键词
聚氯乙烯/木质素/共混物/热稳定性/丙烯酸酯共聚物Key words
poly vinyl chloride/ lignin/ blend/ thermal stability/ copolyacrylate分类
化学化工引用本文复制引用
刘飞跃,许凯,陈鸣才,曹德榕..EA-AA共聚物增容的PVC-木质素共混物的热稳定性[J].化工学报,2012,63(10):3324-3329,6.
