摘要
以稀土复合稳定剂为热稳定剂,采用熔融混炼的加工方法制备了聚三氟氯乙烯(PCTFE)材料,利用动态稳定性测试、应力-应变行为测试、热失重分析(TG)、转矩流变行为测试等手段对PCTFE材料进行了研究。动态热稳定性分析表明:随着稀土复合稳定剂用量的增加,PCTFE材料的动态热稳定性显著提高,当稀土复合稳定剂用量为6 phr时,PCTFE材料的动态稳定时间最长,达到20.1 min。TG分析表明:加入6 phr稀土复合稳定剂后,PCTFE材料起始分解温度(T5%)升高了52℃,热稳定性提高。应力-应变行为分析表明:当稀土复合稳定剂用量为6 phr时,PCTFE材料断裂伸长率与断裂强度均有所提高。转矩流变行为分析表明:稀土复合稳定剂的加入使得PCTFE材料的塑化时间、最高扭矩、平衡扭矩均有所降低,材料加工流动性能有所改善。
Polytrifluorochloroethylene（PCTFE） materials were prepared with the rare earth compound stabilizer as the main heat stabilizer by using melt-kneading. PCTFE materials were studied by using dynamic stability test, stress-strain behavior test, thermal gravimetric analysis （TG） and torque rheological behavior test. Dynamic thermal stability analysis shows that with the increase of rare earth compound stabilizer amount, dynamic thermal stability of PCTFE materials significantly improves, and when the amount of rare earth compound stabilizer is 6 phr, dynamic stability time of PCTFE materials stands for the longest, which is 20.1 min; TG analysis shows that when the adding amount of rare earth compound stabilizer is 6 phr, the initial decomposition temperature （T5%） of PCTFE materials increases by 52℃; stress-strain behavior analysis shows that when the amount of rare earth compound stabilizer is 6 phr, elongation at break and tensile strength of PCTFE materials both improve; torque rheological behavior test analysis shows that the plasticizing time shortens, the maximum torque and the balancing torque of PCTFE materials decrease and the processing flow performance improves with the addition of rare earth compound stabilizer.
出处
《塑料科技》
CAS
北大核心
2014年第6期109-112,共4页
Plastics Science and Technology
