咪唑改性氧化石墨烯对阻燃环氧固化动力学的促进作用

发布时间：2018-03-03 11:41

本文选题：咪唑改性氧化石墨烯　切入点：阻燃环氧　出处：《高等学校化学学报》2017年10期 　论文类型：期刊论文

【摘要】：讨论了添加量为1%(Per hundreds of resin)的咪唑改性的氧化石墨烯(GO-IPDI-MZ)对磷质量分数为1.5%的环氧树脂体系(1.5P-D-U-EMI)固化的影响.差示扫描量热法(DSC)研究结果表明,当GO-IPDI-MZ添加量为1%时不会改变1.5P-D-U-EMI的非等温自催化固化反应特征.添加1%GO-IPDI-MZ的磷质量分数为1.5%的环氧树脂(1.5P-D-GOM-1)的固化起始温度(Tonset)和峰顶温度(Tp)均比1.5P-D-U-EMI体系低,而总的固化热(ΔH)比1.5P-D-U-EMI体系高.说明GO-IPDI-MZ添加量为1%时,对环氧体系起到一定的促进固化和共固化作用.等温DSC分析表明,在固化反应后期,体系出现了玻璃化转变现象,在此阶段,含扩散控制因子的Kamal模型预测结果与实验结果吻合较好.GO-IPDI-MZ的加入使固化反应相对均匀地进行,对固化反应会产生促进和共固化作用.
[Abstract]:The effect of imidazole modified graphene oxide (GO-IPDI-MZ) on the curing of epoxy resin system with phosphorus content of 1.5% was discussed. The results of differential scanning calorimetry (DSC) showed that GO-IPDI-MZ was modified by imidazole-modified graphene oxide (GO-IPDI-MZ). The characteristics of non-isothermal autocatalytic curing reaction of 1.5P-D-U-EMI were not changed when the amount of GO-IPDI-MZ was 1: 1.The initial curing temperature and peak temperature of epoxy resin with phosphorus content of 1.5% for 1GO-IPDI-MZ were lower than those for 1.5P-D-U-EMI system. The total heat of curing (螖 H) is higher than that of 1.5P-D-U-EMI system. The results show that when the amount of GO-IPDI-MZ is 1, it can promote the curing and co-curing of epoxy system. The isothermal DSC analysis shows that the glass transition occurs in the later stage of curing reaction. At this stage, the predicted results of the Kamal model with diffusion control factor are in good agreement with the experimental results. The addition of GO-IPDI-MZ makes the curing reaction relatively uniform, which will promote and co-solidify the curing reaction.
【作者单位】：中国广州分析测试中心广东省化学危害应急检测技术重点实验室;华南理工大学材料科学研究所;
【基金】：国家自然科学基金-广东省联合基金(批准号:U1201243) 广东省科学院人才资助专项(批准号:2017GDASCX-0826)资助~~
【分类号】：O633.13

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