CAJ | 학술논문

采用煅烧碳酸铈的方法制备氧化铈,将其单独用作热稳定剂,并与三碱式硫酸铅、硬脂酸钙二元或三元复配,应用刚果红法考察其对PVC热稳定性的影响.研究结果表明:单一氧化铈具有一定的热稳定作用,这主要是由于稀土可与多个氯原子配住,使PVC中的C-Cl稳定,从而提高了PVC的热稳定性;氧化铈(0.67%)+硬脂酸钙(1%)+三碱式硫酸铅(0.33%)三元复配效果最好,PVC热降解温度为206℃,热稳定时间为1 450 s.
채용단소탄산시적방법제비양화시,장기단독용작열은정제,병여삼감식류산연、경지산개이원혹삼원복배,응용강과홍법고찰기대PVC열은정성적영향.연구결과표명:단일양화시구유일정적열은정작용,저주요시유우희토가여다개록원자배주,사PVC중적C-Cl은정,종이제고료PVC적열은정성;양화시(0.67%)+경지산개(1%)+삼감식류산연(0.33%)삼원복배효과최호,PVC열강해온도위206℃,열은정시간위1 450 s.
Cerium oxide was prepared by calcining cerium carbonate method. The thermal stability of poly ( vinyl chaloride) ( PVC) upon doping the cerium oxide as well as binary or ternary ingredients heat stabilizers of cerium oxide, calcium stearate and plumbum sulphate was determined by means of the congo-red test paper. The results showed that cerium oxide could stabilize PVC because RE could co-ordinate with Cl which made C-Cl in PVC stabilized, and the PVC doping three-component stabilizer with cerium oxide 0.67 % , calcium stearate 1.0%, plumbum sulphate 0.33 % displays excellent thermal stability. The decomposition temperature of PVC was 206℃ , and the thermal stable period was 1 450 s.