Room‐temperature polycondensation of β‐amino acid derivatives. V. Synthesis of hydrophilic polyamide by the polycondensation of β‐amino acid derivatives
Room‐temperature polycondensation of β‐amino acid derivatives. V. Synthesis of hydrophilic polyamide by the polycondensation of β‐amino acid derivatives
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β-氨基酸衍生物的室温缩聚反应V.β-氨基酸衍生物缩聚反应合成亲水性聚酰胺。
DOI：
10.1002/pol.1969.150070308
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发表时间：
1969
期刊：
影响因子：
--
通讯作者：
N. Ogata
中科院分区：
文献类型：
--
作者：
K. Sanui;N. Ogata
N-羟基烷基β-丙氨酸酯是由氨基醇和丙烯酸酯在碱性催化剂存在下于室温下合成聚酰胺。碱金属醇盐和碱土金属醇盐对N-羟乙基-β-丙氨酸酯室温缩聚反应有很强的催化作用。金属醇盐的催化活性顺序为：Li>；Na>；K>；Cs；Ca>；锌>；Mg。铝和钛的醇盐对缩聚反应的催化作用较弱，而硼(III)、锡(IV)、锑(V)和碲(VI)的醇盐对缩聚反应没有催化活性。研究还发现，溶剂对N-羟乙基-β-丙氨酸酯的缩聚过程有一定的影响，只有在甲醇溶液中才能形成相对分子质量最高的聚合物。在催化量的磷酸存在下，低分子量预聚体的固相缩聚反应得到特性粘度为1.0的高分子量聚合物。所得聚合物是亲水性的，其吸湿率是尼龙6的两倍以上。
N-(Hydroxyalkyl) β-alanine ester which was obtained from amino alcohol and acrylate yielded polyamide at room temperature in the presence of a basic catalyst. Alkali and alkali earth metal alkoxides had a strong catalytic effect on the room-temperature polycondensation of N-(hydroxyethyl)-β-alanine esters. The catalytic activity of metal alkoxides decreased in the order: Li > Na > K > Cs and Ca > Zn > Mg. Aluminum and titanium alkoxide had a weak catalytic effect, while boron (III), tin (IV), antimony (V), and tellurium (VI) alkoxides did not show any catalytic activity for the polycondensation. It was also found that solvent had an effect on the course of the polycondensation of N-(hydroxyethyl)-β-alanine esters, and the highest molecular weight polymer was formed only in methanol solution. The solid-phase polycondensation of the low molecular weight prepolymer resulted in a high molecular weight polymer with an inherent viscosity of 1.0 in the presence of a catalytic amount of phosphoric acid. The polymer obtained is hydrophilic and its moisture absorption is more than twice that of nylon 6.