摘要
以酪氨酸、硝酸镧和氢氧化钠为主要原料合成了酪氨酸镧。采用刚果红法、热老化烘箱法、电导率法、转矩流变仪等测定了酪氨酸镧及其与硬脂酸钙、硬脂酸锌复配后的热稳定性能。通过红外光谱探讨了酪氨酸镧的热稳定机理。结果表明,酪氨酸镧单独存在时具有较好的热稳定性能,可通过镧与氯的配位作用及氨基与HCl反应来减缓聚氯乙烯(PVC)热降解;与硬脂酸钙、硬脂酸锌等份数复配后,能更大程度地延长PVC热稳定时间,改善初期着色性。
Lanthanum tyrosine was synthesized with tyrosine, lanthanum nitrate and sodium hydroxide as the raw materials. Thermal stability of lanthanum tyrosine and its compound with calcium stearate and zinc stearate was studied by means of Congo red testing method, thermal aging oven method, conductivity method, and torque rheometer. Stabilization mechanism of lanthanum tyrosine was also studied by infrared spectrum. The results indicated that lanthanum tyrosine alone had good thermal stability for PVC. Thermal degradation of PVC was slowed down by coordination of lanthanum and chlorine, and the reaction of amidogen and HCl. The composite of lanthanum tyrosine, calcium stearate, and zinc stearate could extend greatly thermal stability time and delay color change of PVC.
出处
《中国塑料》
CAS
CSCD
北大核心
2016年第7期77-81,共5页
China Plastics
基金
河北省自然科学基金资助项目(E201505079)
关键词
聚氯乙烯
氨基酸
稀土
钙锌热稳定剂
复配
poly（vinyl chloride）
amino acid
rare earths
calcium/zinc thermal stabilizer
synergism
