一种新型酚醛SMC的增稠机理和固化行为研究

讨论了一种新型酚醛SMC的增稠机理和固化行为.结果表明,增稠剂、填料和硅烷偶联剂对酚醛树脂糊的初期粘度有较大影响,当单独用氢氧化钙作增稠剂时增稠速度快,单独用氧化镁作增稠剂时增稠速度慢;当单独用滑石粉作填料时增稠速度快,单独用粘土作填料时增稠速度慢;通过调整增稠剂和填料各组份的比例可以得到粘度适合的酚醛树脂糊.另外,硅烷偶联剂能够催化酚醛SMC的硬化和固化,这已由DSC和凝胶时间数据所证实.这些研究结果为生产优质的酚醛SMC提供了理论依据.

STUDY OF THICKENING MECHANISM AND CURING BEHAVIOR OF A NOVEL PHENOLIC SMC

Thickening mechanism and curing behavior of a novel phenolic SMC were discussed. The results show that the influence of water in phenolic resin, thickening agent, filler and silane coupling agent on the initial stage viscosity of phenolic resin paste is very obvious. It is found that use of calcium hydroxide as a thickening agent causes rapid hardening of phenolic SMC. Use of magnesium oxide alone as a thickening agent results in a slow hardening rate. Similarly, when talc alone is used as the filler, the viscosity of the phenolic resin paste increases rapidly; when clay alone is used as the filler, the viscosity of the mixture increases slowly. But excellent viscosity control is achieved when a mixture of calcium hydroxide magnesium oxide, talc and clay is used. It has been discovered that the silane coupling agent catalyzes the hardening and curing of phenolic SMC, which is proved by DSC data and gel time data. These research results provide the theoretical basis for producing a good quality of phenolic SMC.