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首页> 外文期刊>Journal of Polymers and the Environment >Polyacetal Polyols for Polyurethanes
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Polyacetal Polyols for Polyurethanes

机译：聚氨酯用聚缩醛多元醇

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摘要

The synthesis of telechelic polyacetals with terminal hydroxyl groups (polyacetal polyols), by the reaction of triethylene glycol divinyl ether with dipropyl-ene glycol in the presence of trimethylolpropane or other triols or diols as starters, in acidic catalysis, has been studied. The synthesized liquid polyacetal triols and polyacetal diols were characterized by hydroxyl number, viscosity, acidity, number average molecular weight (M_n), weight average molecular weight (M_w), molecular weight distribution (M_w/M_n), FT-IR spectra. The obtained polyacetals were transformed in cast elastomers by the reaction with the isocyanate Mondur CD (modified diphenyl methane diisocyanate) with properties very close to the elastic polyurethanes obtained by using conventional polyether triols, copolymers propylene oxide-ethylene oxide The polyacetal polyols are suitable for the synthesis of elastic polyurethanes (polyurethane elastomers, flexible polyurethane foams). Polyacetals are well known biodegradable polymers. Therefore, the polyurethanes based on polyacetal polyols are expected to be biodegradable.
机译：在酸性催化下，在三羟甲基丙烷或其他三醇或二醇作为起始剂的情况下，通过三甘醇二乙烯基醚与二丙二醇的反应，合成了带有末端羟基的远螯聚缩醛（聚缩醛多元醇）。通过羟基数，粘度，酸度，数均分子量（M_n），重均分子量（M_w），分子量分布（M_w / M_n），FT-IR光谱对合成的液态聚缩醛三醇和聚缩醛二醇进行表征。通过与异氰酸酯Mondur CD（改性的二苯基甲烷二异氰酸酯）反应，将获得的聚缩醛转化为浇铸弹性体，其性能与使用常规聚醚三醇，环氧丙烷-环氧乙烷的共聚物获得的弹性聚氨酯非常接近。聚缩醛多元醇适用于合成弹性聚氨酯（聚氨酯弹性体，软质聚氨酯泡沫）。聚缩醛是众所周知的可生物降解的聚合物。因此，预期基于聚缩醛多元醇的聚氨酯是可生物降解的。

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