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首页> 外文期刊>Journal of Applied Polymer Science >Blocked Disocyanate Polyester-Toughened Novolak-Type Phenolic Resin:Synthesis,Characterization,and Properties of Composites
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Blocked Disocyanate Polyester-Toughened Novolak-Type Phenolic Resin:Synthesis,Characterization,and Properties of Composites

机译：嵌段二异氰酸酯聚酯增韧的酚醛清漆型酚醛树脂：合成，表征及复合材料的性能

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摘要

A blocked diisocyanate polyester was synthesized to copolymerize with novolak-type phenolic resin.From the results of IR and NMR spectra,it was found that the blocked diisocyanate polyester reacts with the hydroxyl group of the novolak-type phenolic resin at high temperature.The deblocking temperature for the novolak-type phenloic resin is 120degC.The blocking agent,#epsilon#-caprolactam,is convenient for this system.The copolymer exhibited a single glass transition temperature and a negative deviation of the glass transition temperature.The results showed that the copolymer system is miscible and the molecular motion of the copolymer is increased with the addition of a modifier.The interface between the modified phenolic resin and the glass fiber is improved and the tensile strength of pultruded composite is increased with the modifier content.
机译：合成了一种封端的二异氰酸酯聚酯与酚醛清漆型酚醛树脂共聚。通过IR和NMR光谱分析发现，封端的二异氰酸酯聚酯在高温下与酚醛清漆型酚醛树脂的羟基反应。酚醛清漆型酚醛树脂的最高温度为120°C。封端剂＃epsilon＃-己内酰胺对于该体系比较方便，该共聚物的玻璃化转变温度为单一且玻璃化转变温度为负偏差。共聚物体系互溶，并加入改性剂可提高共聚物的分子运动性。改性酚醛树脂与玻璃纤维之间的界面得到改善，拉挤复合材料的拉伸强度随改性剂含量的增加而增加。

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