蓖麻油基二元酸在PVC制品中的应用研究.pdf

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塑料助剂
2013年第5期(总第101期)
蓖麻油基二元酸在PVC制品中的应用研究
陈慧园蒋乎平“卞刚
(江南大学化学与材料工程学院,无锡,214122)
摘要以龍麻油酸与丁二酸酐、马来酸酐等酸酐合成了五种蓖麻油基二元酸。通过电导率法、热
老化烘箱法和刚果红法等方法研究了龍麻油基二元酸对聚氯乙烯(PVC)热稳定性能的影响。研究结果
表明,蓖麻油基二元酸单独使用时可改善PVC初期着色,且热稳定效果随其取代基的不同而不同。以B
ー二酮为对比,考察了蓖麻油基二元酸对异辛酸钙/马来酸蓖麻醇酯锌(LA-Ca/RAM-Zn)和硬脂酸钙/硬
脂酸锌(CaSt2/ZnSt2)体系的热稳定效果的影响,发现其与钙锌盐之间具有协同效应。且当添加0.3份
的马来酸蓖麻醇酯和Bー二酮于CaSL_/ZnSt2体系时,静态热稳定时间分別为26.9min和26.3min
关键词聚氟乙烯蓖麻油酸钙/锌热稳定剂热稳定性能
doi:10.3969/j.1isa.1672-6294.2013.05.007
Application Research of Vegetable Ricinoleic Diacid in PVC
Chen Huiyuan Jiang Pingping Bian Gang
School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
Abstract: Five kinds of novel ricinoleic diacids were synthesis from ricinoleic acid with different an
hydrides. The influence of ricinoleic diacid on the processing thermal stability of poly(vinyl chloride)was in
vestigated by measuring dehydrochlorination rate of PVC, static heat stability test and Congo red test. The re-
sults showed that ricinoleic diacid can improve the initial color stability of PVC and thermal stability varies with
the substituent group. Moreover, in comparison with B-diketone, synergistic effect was found between ricin-
oleic diacid and metallic soaps. Ricinoleic diacid improved the stabilization effect of caleium isooctanate/ zine
soap of ricinoleic acid maleate and the traditional metallic stearates stabilizer(Cast2 /Znst2 ) The static thermal
stability time is 26.9 min, 26.3 min, respectively, when added 0.3 phr ricinoleic acid maleate and 8-dike
tone to Cast2/Znst2 system
Key words: poly(vinyl chloride); ricinoleic acid; calcium/zinc thermal stabilizer; thermal stability
常用的PVC辅助热稳定剂有亚磷酸酯、环氧有热稳定和增塑双重功能,对钙/锌、钡钊/锌等热稳
化合物、多元醇和Bー二嗣等。亚磷酸酯可以提高定剂作用明显,但对有机锡稳定剂没有影响;多元
PVC长期热稳定效果,与B-二嗣协同使用时对初醇类能螯合金属氯化物,缓解氯化物催化降解,但
期着色改善比较明显,但其易水解;环氧化合物具其亲水性较强且与PVC及増塑剂的相容性差:3
二酮改善PC初期着色效果明显,但当其含量过高
收稿日期:2013-06-03
时会加速着色,且价格较为昂贵-4。开发性能良
基金项目:国家科技部十二?五科技支撑项目
好、价格便宜且无毒的辅助热稳定剂,已成为人们
(2012BAD32BO3)
亟待解决的问题。目前关于植物油基辅助热稳定