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通过对EPS和PMMA材料的对比试验,研究了两种材料在100℃～300℃时的热变化;系统研究了两种材料在高温下的发气量与时间、发气量与温度的关系。结果表明,PMMA试样在150℃左右有体积膨胀现象;PMMA的发气速度均比EPS的大
By comparing the EPS and PMMA materials, the thermal changes of the two materials at 100 ℃ ~ 300 ℃ were studied. The relationship between the gas evolution and the time, the gas evolution and the temperature at two temperatures were systematically studied. The results show that the PMMA sample has a volume expansion phenomenon at about 150 ℃; the gas evolution velocity of PMMA is higher than that of EPS