聚对苯二甲酰对苯二胺分子结构及热变性中红外光谱研究
MIR spectroscopy study for molecular structure and thermal denaturation of PPTA
张碧涵 1常明 2王倩 1孟露 2吴梦谣 2张勇 1于宏伟 2徐元媛3
作者信息
- 1. 河北科技大学化学与制药工程学院,河北 石家庄 050018
- 2. 石家庄学院化工学院,河北 石家庄 050035
- 3. 石家庄学院化工学院,河北 石家庄 050035;石家庄市药用高分子材料重点实验室,河北 石家庄 050035
- 折叠
摘要
研究了聚对苯二甲酰对苯二胺(PPTA)的分子结构及热变性.结果表明:温度为303～573 K,随温度升高,PPTA分子酰胺Ⅰ、酰胺Ⅱ、酰胺Ⅲ特征吸收谱带对应的红外吸收频率及强度均明显改变;随温度升高,少量PPTA分子酰胺键断裂,影响其热稳定性.
Abstract
The molecular structure and thermal denaturation of poly-p-phenylene terephthamide(PPTA)were studied.The results indicate that the corresponding infrared absorption frequency and intensity of characteristic absorption bands of amide Ⅰ,amide Ⅱ,and amide Ⅲ in PPTA molecules change obviously as the temperature increases from 303 K to 573 K.The increase of temperature can cause a small amount of PPTA molecules to break amide bonds,affecting the thermal stability of PPTA.
关键词
聚对苯二甲酰对苯二胺/三级中红外光谱/分子结构/热变性Key words
poly-p-phenylene terephthamide/three-level middle infrared spectroscopy/molecular structure/thermal denaturation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据