摘要
选用5种不同牌号的PVC糊树脂制备出增塑糊,研究了PVC糊树脂的颗粒特性对增塑糊陈化行为的影响。结果表明:①小粒子可填充在大粒子之间,从而降低增塑剂的填充量,自由增塑剂更多,成糊后初始黏度较低;②与紧密型糊树脂相比,松散型糊树脂的增塑糊黏度稳定性更好;③分子质量越大,真实密度越大,增塑糊黏度稳定性越好;④对于紧密型糊树脂,低黏度的增塑糊在陈化过程中大粒子会发生沉降,导致糊中粒子分布不均一。
Plasticized pastes were prepared from five grades of PVC paste resins.The effects of particle characteristics of PVC paste resins on aging behavior of plasticized pastes were studied.The results showed that large particles could be filled by small particles,leading to the reduced filling amount of plasticizer and more free plasticizers,so the initial viscosity of the plasticized pastes was lower.Compared with tight paste resins,loose paste resins had stable viscosity.The higher molecular weight was,the higher true density was,and the stabler the viscosity of plasticized paste was.For tight paste resins,the large particles in the plasticized paste with lower viscosity would settle during the aging process,resulting in the uneven distribution of particles in the plasticized pastes.
作者
夏爱华
凌宗勇
苏江林
唐涛
丁运生
XIA Aihua;LING Zongyong;SU Jianglin;TANG Tao;DING Yunsheng(School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China;National Special Wire and Cable Product Quality Inspection Center,Wuhu 238300,China;Foshan Fangpu Protection Technology Co.,Ltd.,Foshan 528314,China;Sichuan Changhong Molding Technology Co.,Ltd.,Mianyang 621000,China;Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices,Hefei 230009,China)
出处
《聚氯乙烯》
CAS
2020年第6期13-19,共7页
Polyvinyl Chloride
基金
安徽省科技重大专项项目(JZ2019AKKZ0468)
校地合作产业创新引导资金项目(JZ2019AHDS0006)。
关键词
PVC糊树脂
增塑糊
陈化行为
颗粒特性
黏度
PVC paste resin
plasticized paste
aging behavior
particle characteristic
viscosity
