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用改装后的100型气相层析仪,以氢气为载气,热导池为检测器,用反相气相色谱法测定聚乙烯醇(PVA)的玻璃化温度.选用甲醇、正丙醇、乙腈、四氯化碳作探针分子.测得PVA的玻璃化温度分别为85.6℃,85.6℃、85.6℃、83.6℃,与文献值相符.载气氢气的流速在78.4-96.0毫升/分之间变化,惰性气体氮气的进样量在0.2微升-1.0微升之间变化对实验结果无影响.柱中PVA的量在0.5241克-0.8487克之间变化以及无论用Chromosorb w AW-DMCS,60-80目或Chromosorb W-HP,100-120目作担体,在本实验条件下对PVA玻璃化温度的测定也无明显的影响.
Using modified 100 gas chromatography, hydrogen as the carrier gas, the thermal conductivity of the pool as a detector, using reversed-phase gas chromatography to determine the glass transition temperature of polyvinyl alcohol (PVA). Select methanol, n-propanol, , Carbon tetrachloride as probe molecule.The glass transition temperatures of PVA were 85.6 ℃, 85.6 ℃, 85.6 ℃ and 83.6 ℃, respectively, which accorded with the literatures.The carrier gas hydrogen flow rate was between 78.4-96.0 ml / min Variations of the inert gas nitrogen injection volume between 0.2 and 1.0 microliter had no effect on the experimental results.The amount of PVA in the column varied from 0.5241 g to 0.8487 g and the Chromosorb w AW-DMCS, 60- 80 mesh or Chromosorb W-HP, 100-120 mesh as carrier, under the experimental conditions, the determination of PVA glass transition temperature has no obvious effect.