共查询到18条相似文献,搜索用时 140 毫秒
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酚醛树脂改性研究进展 总被引:1,自引:0,他引:1
介绍了酚醛树脂增韧和耐热改性的几种新方法,包括用梓油、亚麻油和聚砜改进酚醛树脂的韧性;用苯并恶嗪化合物、酚三嗪树脂和纳米粒子改进酚醛树脂的耐热性等。 相似文献
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《玻璃钢/复合材料》2021,(8)
酚醛树脂具有优异的耐热抗烧蚀性能、良好的力学性能、突出的阻燃性能,在航空航天、摩擦材料、防火阻燃等领域得到了广泛地应用。提高酚醛树脂的耐热性一直是业内研究的热点,本文对近年来酚醛树脂的耐热改性方法进行了综述,包括结构改性、纳米掺杂、捕捉挥发分、可陶瓷化,其中,重点总结了结构改性方法。最后,对该领域所存在的问题进行了概述,并展望了其发展前景。 相似文献
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介绍了酚醛树脂的耐热改性研究方法以及改性后酚醛树脂应用,耐热改性的方法包括:芳烃改性、焦油改性、聚酰亚胺改性、硼酸改性、有机硅改性、钼酸改性、苯并噁嚓化合物、纳米材料等改性酚醛树脂。 相似文献
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α-羟基-2-萘甲酸对热固性有机硅改性酚醛树脂性能的影响 总被引:2,自引:0,他引:2
研究了α-羟基2-萘甲酸作为热固性有机硅改性酚醛树脂固化促进剂,对其固化温度、粘接性能、耐热性能和贮存性能的影响。表明α-羟基2-萘甲酸作为杂环有机弱酸,在有机硅改性酚醛树脂固化过程中产生H+,以及有机杂环的封端作用,可使热固性有机硅改性酚醛树脂的固化温度下降,粘接性能和耐热性能均有提高,而且还具有一定的贮存期。 相似文献
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在合成酚醛树脂的过程中引入有机硅预聚物和硼酸,制得硼硅酚醛树脂,并在此基础上加入正硅酸乙酯,原位水解生成SiO2,进一步改性了硼硅酚醛树脂。分别考查了有机硅预聚物、硼酸和正硅酸乙酯加入量对改性酚醛树脂粘接强度的影响。通过IR考查了改性树脂的结构,硼氧键和硅氧键成功地引入到酚醛树脂中。还通过DSC和不同条件下粘接强度的测试考查了改性树脂的固化性能,确定了其固化工艺。空气气氛中的热重分析则表明改性酚醛树脂初始分解温度为475℃,1000℃残炭率为21%,耐热性明显优于普通酚醛树脂。 相似文献
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Phenolic resins have been under continuous development as an important thermosetting resin material since the first successful trial production of the synthetic resin in Japan in 1911. Sumitomo Bakelite Co., Ltd. traces its origin to the birth of this material (i.e. the successful trial production) and has been developing synthetic and composite production technologies since that time for adaptation to various applications. Phenolic resin molding compounds, which have been among the major applications of phenolic resins since their inception, exhibit highly favorable characteristics in terms of strength, heat-resistance, long-term reliability and cost, and therefore have been used in a wide range of applications from kitchen parts to components for electronic appliances and automobiles. In particular, phenolic resin molding compounds are gathering attention as a lightweight solution to replace metals in automotive applications, among others applications, and we are investigating these applications while making a vigorous research effort toward further improving the mechanical properties of these materials. This new research and development is founded on detailed prediction and analysis of the hardened structures in phenolic resins.This report outlines the history of phenolic resins, which were invented in 1907 and brought to Japan, along with the associated technology, as a result of personal ties between Dr. Leo Hendrik Baekeland and Dr. Jokichi Takamine; the widening application of phenolic resins in recent years; showcase applications based on green sustainable chemistry; and examples of new analysis methods (chemical analysis) and structural analysis. We hope this report will encourage the research and development of plastics in the new century and the development of commercial products [1]. 相似文献
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室温固化耐高温耐水胶粘剂的研制 总被引:1,自引:0,他引:1
采用酚醛环氧树脂F-51和环氧树脂CYD-128复合树脂、自制的羧基丁腈改性环氧树脂增韧剂和酚醛胺固化剂以及陶瓷耐热填充剂复配,研制出1种室温固化耐高温耐水胶粘剂。测试了不同固化剂,增韧剂,填充剂对胶粘剂粘接强度的影响并考察了胶粘剂的耐水性。结果表明,该胶A组分最佳配方为:CYD-12880g,F-5120g,羧基丁腈改性环氧树脂10g,轻质碳酸钙20g,陶瓷耐热填充剂1#40g,2#20g;B组分配方为:酚醛胺固化剂40g,轻质碳酸钙20g,陶瓷耐热填充剂1#35g,A与B质量比为2:1时,室温固化1d后的剪切强度达21.4MPa(室温),150℃剪切强度6.2MPa,水中浸泡30d后强度几乎无变化。该胶可长期在高温条件下使用,满足耐磨陶瓷粘接的技术要求。 相似文献
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作为目前最成功的改性酚醛树脂品种之一,硼酚醛树脂具有优异的耐热性能和耐烧蚀性能,良好的力学性能、摩擦性能和阻燃性能等。硼酚醛树脂及其复合材料可广泛应用于航空航天、武器装备、汽车制动、防火阻燃等领域。对硼酚醛树脂及其复合材料的研究进展进行了综述。首先概述了硼酚醛树脂的不同制备方法及硼酚醛树脂的改性途径;然后重点总结了硼酚醛树脂基复合材料的常用制备方法及其耐热性能、耐烧蚀性能、力学性能、摩擦性能、阻燃性能、耐水性能;最后,对该领域所存在的问题进行了总结,并展望了其发展趋势。 相似文献