钛酸四乙酯催化酯交换缩聚法合成聚醚型聚氨酯.pdf

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化工进展
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CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2016年第35卷第3期
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3研究开发
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钛酸四乙酯催化酯交换缩聚法合成聚瞇型聚氨酯
刘冰灵,田恒水,崔喜
(华东理工大学化工学院,上海200237)
摘要:以钛酸四乙醋(TET)为催化剂,聚四氢呹喃融二蹲(PTMG)和1,6-六亚甲基二氨基甲酸甲酯(HDC
为原料,1,4-丁二醇为扩链剂,酯交换編聚合成了聚醚型聚氨酯(PEPU)弹性体。以二丁基氧化锡(DBTO)催
化合成的PEPU为参考,通过红外光谱(FTR)、凝胶色谱(GPC)、热重分析(TGA)、カ力学性能与光学性能测
试表征TET的催化效果。通过一系列单因素实验探讨了缩聚温度、编聚附间、预聚温度、预聚时间对PEPU特
性黏度的影响规律。结果表明,TET比DBTO催化制得的PEPU热性能更好,力学性能更优。较佳的制备工艺
为:预聚阶段温度为110℃,压力为0.070MPa,时间为20min;160℃下高真空缩聚110min。
关键词:钛酸四乙酯;催化剂;酯交換缩聚;合成;聚酯;黏度
中图分类号:TQ323.8
文献标志码;A
文章编号:1000-6613(2016)03-0856-0
DOI:10.16085/issn.1000-6613.2016.03.031
Tetraethyl titanate as a catalyst for the synthesis of polvether-polyurethanes
by transurethane polycondensation
L1U Bingling, ILAN Hengshui, CUI Xi
School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)
Abstract: Thermoplastic polyether polyurethanes(PEPUS)were prepared by a transurethane
polycondensation method with poly(oxytetramethylene) glycol(PTMG)as a soft segment, dimethyl
hexane-1, 6-dicarbamate(HD) and 1, 4-butanediol (BDO)as hard segments in the presence o
tetraethyl titanate(TET). FTIR, GPC, TGA and mechanical and optical property tests were used to
characterize the catalytic performance of TET and compare with a standard catalyst of dibutyltin oxide
(DBTO). The effects of synthesis conditions such as polycondensation temperature, polycondensation
time, prepolymerization temperature and prepolymerization time on the intrinsic viscosity of PEPU
were discussed by a series of single factor experiments. The results showed that PEPU with TET as a
catalyst exhibited better thermal and mechanical properties than PEPU with DBTO as a catalyst did
And the optimal processing conditions were: the prepolymerization reaction was carried out at 110 C
for 45min under a reduced pressure of 0.070MPA and the polycondensation reaction was conducted at
160C for 110min under vacuum
Key words: tetraethyl titanate; catalyst; transurethane polycondensation; synthesis; polyurethane;
Viscosity
传统的聚氨酯合成路线的主要原料为异氧酸酯利用二氨酯的酯交换来合成聚氨酯,如王小梅
和多元醇山到。异氰酸酯毒性高,其原料光气剧毒,
生产过程存在环境污染问题和安全隐患。因此,非收稿日期:2015-08-06:修改稿日期:2015-10-5
光气法和非异氰酸酯法合成聚氨酯成为该领域的研
第一作者:刘冰灵(1986-),女,博七研究生,研究方向为绿色合成
聚醚型聚氨酯弹性体。E- mail Ibl_8808@l26,com。联系人:田恒水,
究热点,主要集中在羰基化法的?。近年来,有报道教授。E- mail hstianaecust.edu. cn