摘要
将硬脂酸铈与其他助剂进行复配,制备了硬脂酸铈复合热稳定剂。采用刚果红试纸法、烘箱热老化法、转矩流变仪、红外光谱分析等方法对硬脂酸铈复合热稳定剂进行性能表征。结果表明,硬脂酸铈复合热稳定剂配方为硬脂酸铈∶硬酯酸锌∶β-二酮∶季戊四醇=1.2∶1.0∶0.3∶1.0,性价比最佳。与钙锌稳定剂相比,烘箱老化热稳定性能和流变性能更优异,可取代钙锌稳定剂首次应用于PVC建筑模板中,使弯曲强度和弹性模量分别提高19.68%和14.62%。同时,提高了耐候性能,748 h室外老化后,△E为1.46,△b为-2.36。
Cerium stearate compound heat stabilizer was prepared by the mix of cerium stearate with other additives. The Gongo test,Oven aging test,rheological property test and FT-IR test were employed to characterize properties of the stabilizer.The results show that it has the highest performance-price ratio when the ratio of cerium stearate ∶ zinc stearate ∶ β-diketone∶ pentaerythritol is 1. 2 ∶ 1. 0 ∶ 0. 3 ∶ 1. 0. Compared with Ca/Zn stabilizer,cerium stearate compound heat stabilizer exhibits a better performance of heat stability and rheological property. Thus it can substitute Ca/Zn stabilizer and be applied in PVC formwork for the first time,which increases the flexural strength and flexural modulus of PVC formwork respectively by 19. 68% and 4. 62%. Also,the weatherability was improved. △E and △b are 1.46 and-2. 36 respectively by 748 hours outer aging test.
作者
于晓丽
杨占峰
张玉玺
曹鸿璋
葛瑞祥
吴豪
YU Xiao-li;YANG Zhan-feng;ZHANG Yu-xi;CAO Hong-zhang;GE Rui-xiang;WU Hao(Baotou Research Institute of Rare Earths, Baotou 014030, China;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou 014030, China;National Engineering Research Centre of Rare Earth Metallurgy and Function Materials, Baotou 014030, China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2018年第2期18-24,共7页
Chinese Rare Earths
基金
工信部稀土共性关键技术研发项目(2014A1853)
包头市重大项目(2014C1857)
内蒙古自治区自然科学基金项目(2016MS0214)
关键词
稀土
稳定剂
硬脂酸
PVC
建筑模板
rare earth
stabilizer
stearic acid
polyvinyl chloride
formwork
