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针对覆铜板的耐高温要求,分别使用胺类固化剂4,4′-二氨基二苯砜(DDS)、4,4′-二氨基二苯醚(DDE)和乙二胺(EDA)固化改性双酚A型环氧树脂,研制适用于耐高温覆铜板的环氧树脂固化物。用示差扫描量热法(DSC)研究其固化过程,讨论了固化剂用量、固化剂种类及固化温度等因素对固化物玻璃化转变温度(Tg)的影响。实验结果表明,固化物耐热性最好的配比不是化学计量,而是偏离化学计量,在理论用量的基础上适当增加固化剂用量,可有效地提高固化产物的玻璃化温度Tg值;使用芳香胺类固化剂固化双酚A型环氧树脂,其固化产物有较高的玻璃化温度,可以满足覆铜板耐高温的要求。
According to the requirements of high temperature resistance of CCL, curing with amine hardener 4,4’-diaminodiphenyl sulfone (DDS), 4,4’-diaminodiphenyl ether (DDE) and ethylenediamine (EDA) Bisphenol A epoxy resin, developed for high temperature CCL epoxy cured. The curing process was studied by differential scanning calorimetry (DSC). The effects of curing agent dosage, curing agent type and curing temperature on the glass transition temperature (Tg) of the cured product were discussed. The experimental results show that the best heat-resistant curing compound ratio is not stoichiometric, but deviate from stoichiometry, based on the theoretical amount of appropriate amount of curing agent can effectively increase the glass transition temperature of the cured product Tg value; the use of Aromatic amine hardener curing bisphenol A epoxy resin, the cured product has a higher glass transition temperature, to meet the high temperature CCL requirements.