合成了“PMR”型(Polymerization of Monomer Reactants)聚酰胺-酰亚胺树脂。用它制成的复合材料能在260℃长期使用。利用模型化合物对聚酰胺-酰亚胺形成的机理进行了研究。
Abstract
The resin solution of NA capped "PMR" type polyamideimide (PAI) was prepared frpm bicyclo [2. 2. 1] hept-5-ene-2
3-dicariboxylic acid ethyl ester
1
2
4-trimellitic acid-2-(or-1-) ethyl ester and 4
4'-diaminodiphenyl methane in ethanol. This resin solution is specially suitable for the preparation off composites. The flexural strenght of the glass fabrics reinforced plastic was 6000-7000 Kg/cm2 (RT) and 4000-4400 Kg/ cm2 (260-300℃)
respectively. The result of isothermal ageing for 800 hours indicated that this composite can be used at 260℃. The mechanism of the formation of poly-amide-imide was discussed by using appropriated model compounds.