结果表明热固性酚醛树脂的固化过程，首先是羟甲基发生缩合反应，缩合反应形成醚键是主要的。
It was shown that the curing process of resoles, at first, proceeded by condensation reaction of methylol groups, and the formation of dimethylene ether linkage was predominant.
扩链剂的存在不是键合剂MAPO提高丁羟推进剂伸长率的必要条件。
The existence of any extender is not necessary for increasing the elongation of HTPB propellants by bonding agent MAPO.
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