4-炔丙氧基苯基马来酰亚胺共混改性聚芳基乙炔

Process and thermal stability of 4-PPM-PPA blends

将4-炔丙氧基苯基马来酰亚胺(简称4-PPM)与聚芳基乙炔(简称PAA)进行共混改性,在保持PAA树脂耐热性的基础上改善其固化工艺性能。用红外、流变及DSC等测试方法研究了共混树脂的固化工艺性能,用TGA及DMA的测试方法研究了共混树脂固化物的耐热性能。结果表明共混树脂具有良好的加工性能,并且固化物也具有良好的耐热性能。玻璃化转变温度高于370℃,在N2中的分解温度高于400℃,失重5%的温度高于413℃,900℃的残留率高于56%。对比各个配比的共混树脂,4-PPM质量分数为50%的树脂表现出较好的固化工艺性能和耐热性能,可作为耐高温复合材料的基体。

In this paper, the blend of N - （4 - propargyloxyphenyl） maleimide （4 - PPM） and polyarylacetylene （PAA） resin, prepared by melting 4 - PPM and mixing uniform with PAA was studied. The cure behaviors of 4 - PPM - PAA blends were characterized by FT - IR and DSC techniques. Thermal stability of the cured blends was also evaluated by TGA and DMA techniques. The blends resins possessed excellent processability and the cured blends exhibited high thermal stability and the test showed that its glass transition temperature was more than 370 degrees, its decomposition temperature in nitrogen was more than 400 degrees, the temperature when weight less was 5 percent was more than 413 degrees, the carbon residue in 900 degrees was more than 56 percent and the processability and themal stability were excellent when 4 - PPM＇s mass friction was 50 percent compared with order test for molar ratio of the blends and the curing process was 130 ℃/1 h ＋ 150 ℃/1 h ＋ 170 ℃/2 h ＋ 190 ℃/2 h ＋ 210 ℃/2 h ＋ 230 ℃/2 h ＋ 250 ℃/4 h. The blends resins might be candidate matrices for the high performance composites.