二乙二醇醚马来酸酯钙/锌热稳定剂的制备及应用研究  

Preparation and applications of diethylene glycol ether maleate calcium/zinc heat stabilizer

作　　者：高鑫鑫 蒋平平 施一民 冷炎 张萍波 GAO Xinxin;JIANG Pingping;SHI Yimin;LENG Yan;ZHANG Pingbo(International Joint Research Laboratory of Biomass Conversion Technology,School of Chemistry and Materials Engineering,Jiangnan University,Wuxi 214122,China;Hangzhou Yile Rubber Plastic Co,Ltd,Hangzhou 311300,China)

机构地区：[1]江南大学化学与材料工程学院,生物质转化技术国际联合研究实验室,江苏无锡214122 [2]杭州以勒橡塑有限公司,杭州311300

出　　处：《中国塑料》2021年第12期88-93,共6页China Plastics

摘　　要：以马来酸酐和二乙二醇醚为原料在无催化剂条件下制得二乙二醇醚马来酸酯(MD),此分子结构中具有酯基、醚键及碳碳双键,将此中间产物分别与乙酸钙、乙酸锌反应,制得二乙二醇醚马来酸酯钙/锌盐(MD-Ca/Zn)。通过傅里叶红外测试分析了热稳定剂产物的结构,分子中含有醚键、酯基、碳碳双键、羧酸盐结构,可作为PVC主效热稳定剂。通过刚果红法、热老化法、热失重法、电导率等检测方法,和市售硬脂酸钙/锌进行对比,验证了热稳定效果及性能,分析了热稳定机理,同时探究了与辅助热稳定剂β-二酮(硬脂酰苯甲酰甲烷)的协同作用。结果表明,当MD-Ca/Zn=2∶1(质量比,下同)时,对PVC的热稳定效果最好;初期白度可以达到40 min,静态热稳定时间为35 min;与热稳定剂总质量10%的β-二酮复配后PVC的热稳定性能还可进一步提升。Diethylene glycol ether maleate(MD)was prepared using maleic anhydride and diethylene glycol ether as raw materials without a catalyst,and its molecular structure was determined to be ester groups,ether bonds,and carbon-carbon double bonds.This intermediate product was respectively reacted with calcium acetate and zinc acetate to prepare diethylene glycol ether maleate calcium/zinc salt(MD-Ca/Zn).The structure of the resultant product was further analyzed with FTIR spectroscopy,indicating that its molecule contains ether bond,ester group,carbon-carbon double bond,and carboxylate structure.This indicated that it could be used as a heat stabilizer for PVC.The thermal stabilizing effect of the MD-Ca/Zn was verified through the Congo red,thermal aging,thermogravimetry,electrical conductance measurements as well as the comparation the commercially available calcium/zinc stearate.Its thermal stabilization mechanism was analyzed and explored.Furthermore,the synergistic effect of the MD-Ca/Zn with an auxiliary heat stabilizer,β-diketone(stearoyl benzoyl methane),was investigated.The results indicated that the PVC compound exhibited an optimal thermal stability at an MD-Ca/Zn mass ratio of 2∶1,and its initial whiteness and static stabilization time reached 40 min and 35 min,respectively.The thermal stability could be further improved by combination with 10% β-diketone in the total amount of heat stabilizers.

关 键 词：二乙二醇醚马来酸酯钙/锌盐 热稳定剂 协同作用 聚氯乙烯 

分 类 号：TQ314.245.1[化学工程—高聚物工业]