Preparation of hexamethylol melamine resin with low crystallization water and low viscosity for hexamethylol melamine/polyvinyl alcohol composite membrane

IF 0.7 4区工程技术 Q4 CHEMISTRY, APPLIED

Polish Journal of Chemical Technology Pub Date : 2022-03-01 DOI:10.2478/pjct-2022-0007

Xingjian Liu, Yanwen Guo, Jianqi Zheng, Jiang Wu, Bing Hu

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引用次数: 1

Abstract

Abstract Hexamethylol melamine resins (HMM) with low crystallization water content and low viscosity were prepared by inhibiting the condensation polymerization of low hexamethylol melamine. The effects of catalyst, pH, formalde-hyde/melamine ratio, reaction temperature and time on the synthesis parameters of HMM were investigated. The results showed that the sample (HMM8) synthesized with Na2CO3-NaHCO3 as catalyst had the crystallization water content lower than 10%, being with a viscosity of about 0.26 Pa·s. The melting temperature of HMM8/polyvinyl alcohol (PVA) curing system was about 164.3 °C. It was found that the higher the amount of formaldehyde, the greater the hydroxyl methyl bounded to each triazine ring. Compared with the traditional melamine formaldehyde resin which had the crystallization water content of about 20–30%, the production of this resin was expected to reduce the energy consumption of industrial reaction, while the resin with 10% crystallization water content was more conducive to the development of alloying HMM/PVA composite membrane.

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低结晶水低粘度六羟甲基三聚氰胺/聚乙烯醇复合膜的制备

摘要通过抑制低六羟甲基三聚氰胺的缩聚反应，制备了结晶水含量低、粘度低的六羟甲基蜜胺树脂。考察了催化剂、pH、甲醛/三聚氰胺比例、反应温度和反应时间对HMM合成参数的影响。结果表明，以Na2CO3-NaHCO3为催化剂合成的样品（HMM8）结晶水含量低于10%，粘度约为0.26Pa·s。HMM8/聚乙烯醇（PVA）固化体系的熔融温度约为164.3°C。发现甲醛的量越高，与每个三嗪环结合的羟甲基就越大。与结晶水含量约为20–30%的传统三聚氰胺甲醛树脂相比，该树脂的生产有望降低工业反应的能耗，而结晶水含量为10%的树脂更有利于合金化HMM/PVA复合膜的开发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polish Journal of Chemical Technology CHEMISTRY, APPLIED-ENGINEERING, CHEMICAL

CiteScore

1.70

自引率

10.00%

发文量

审稿时长

4.5 months

期刊介绍： Polish Journal of Chemical Technology is a peer-reviewed, international journal devoted to fundamental and applied chemistry, as well as chemical engineering and biotechnology research. It has a very broad scope but favors interdisciplinary research that bring chemical technology together with other disciplines. All authors receive very fast and comprehensive peer-review. Additionally, every published article is promoted to researchers working in the same field.