双酚A改性热塑性酚醛树脂微波合成的研究

Study on Microwave Synthesis of Bisphenol Modified Novolac Resins

在微波合成的基础上,研究不同双酚A(BPA)加入量对热塑性酚醛树脂性能的影响,并对树脂的分子结构进行分析。结果表明:尽管双酚A的加入导致对位联结量增多而降低了树脂聚合速度,但在适当的加入量范围内,可使游离酚含量大幅度降低的基础上,树脂流动性、韧性以及覆膜砂强度等得到综合改善。

The effect of different bisphenol A （BPA） contents on the properties of novolac resins was studied by microwave synthesis method, and the molecular structures of the resins were analyzed. The results show that the para methylene linkages increase and the cure rate decrease with increasing BPA content, whereas, based on the obvious decrease of free phenol, the good combination of resin fluidity, toughness and strength of resin-coated sands improve remarkably, when the BPA content is in the reasonable range.