CAJ | 학술논문

采用活化剂（尿素、碳酸锌）和碳酸氢钠对偶氮二甲酰胺（AC）改性制备硬质聚氯乙烯（R-PVC）用复合发泡剂,并用热分析和放气量检测对复合发泡剂进行了表征。结果表明当AC、NaHCO3、尿素和碳酸锌的质量比为10：10：2.5：2.5时所得的复合发泡剂分解温度处于R-PVC成型加工范围内,吸-放热基本平衡,放气量大且无突发性。采用这种复合发泡剂制备的硬质聚氯乙烯发泡材料具有较好的力学性能和微孔结构。
채용활화제（뇨소、탄산자）화탄산경납대우담이갑선알（AC）개성제비경질취록을희（R-PVC）용복합발포제,병용열분석화방기량검측대복합발포제진행료표정。결과표명당AC、NaHCO3、뇨소화탄산자적질량비위10：10：2.5：2.5시소득적복합발포제분해온도처우R-PVC성형가공범위내,흡-방열기본평형,방기량대차무돌발성。채용저충복합발포제제비적경질취록을희발포재료구유교호적역학성능화미공결구。
A novel kind of composite foaming agents for rigid PVC（R-PVC） was prepared from modifying azodicarbonamide（AC） with kickers（carbamide,zinc carbonate） and sodium bicarbonate.The samples were analyzed with thermal analysis and gas volume test.The results indicate that the novel composite foaming agent with a mass ratio of 10∶10∶2.5∶2.5,which represent AC,carbamide,zinc carbonate and sodium bicarbonate respectively,poses optimized properties： its decomposition temperature lies within the temperature range suitable for R-PVC processing,its endotherm equals exotherm on the whole and this composite foaming agent has a high volume of liberated gas but without any abruptness.R-PVC foam manufactured with this composite foaming agent has better mechanical properties,and its SEM images present fine microcellular structure.