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高固体含量线性酚醛树脂的固化动力学 被引量:5

Curing Kinetics of Novolac-Type Phenolic Resin with High Solid Content
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摘要 合成了高固体含量(〉85%)的线性酚醛树脂,经凝胶渗透色谱/多角度激光光散射(SEC/MALLS)联用仪测定其数均分子量为1577,且分子量分布范围较窄,-Mw/-Mn仅为1.127。采用差示扫描量热(DSC)分析技术在50℃~300℃温度范围内,以不同的升温速率(2.5℃/min、5℃/min、7.5℃/min和10℃/min)研究了该酚醛树脂的固化反应过程。结果表明,该高固体含量线性酚醛树脂的凝胶化温度Tgel=110.61℃,固化温度Tcure=129.14℃,后处理温度Ttreat=146.96℃;根据Kissinger方程、Ozawa方程和Crane方程以及n级动力学模型确定该树脂的固化动力学方程为dα(t)/dt=2.09×1017(1-α)0.95exp(-2.10235×104/T)。 Novolac-type resin with high solid content(85%) was synthesized,of which number average molecular weight is 1577 and distribution is narrow.The curing process was studied by differential scanning calorimetry(DSC) at different heating rates of 2.5 ℃/min,5 ℃/min,7.5 and 10 ℃/min between 50 ℃~300 ℃.The gelation temperature,curing temperature and post processing temperature of the resin are 136.68 ℃,163.16 ℃ and 197.39 ℃ respectively.According to Kissinger equation,Ozawa equation,Crane equation and the n-level kinetic model,the curing kinetic equation is dα(t)/dt=2.09×1017(1-α)0.95exp(-210235×103/T).
出处 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2012年第4期51-54,共4页 Polymer Materials Science & Engineering
关键词 酚醛树脂 高固体含量 固化动力学 差示扫描量热法 分子量分布 novolac-type resin large solid content curing kinetics DSC molecular weight range
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参考文献11

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