CAJ | 학술논문

利用差示扫描量热分析仪、热重分析仪、电子拉力机、熔体流动速率仪和毛细管流变仪等对聚甲基乙撑碳酸酯（PPC）的热性能、力学性能和熔融流变行为进行了研究．结果表明：PPC 具有较低的玻璃化转变温度（Tg ）和热分解温度（Td ），Tg 和失重率5％的 Td 分别为31℃和211．3℃；PPC 的力学性能较差，其拉伸强度和断裂伸长率分别为7．50 MPa 和536．63％，熔体流动速率随温度提高而有所升高；PPC 熔体为假塑性流体，其熔体表观黏度随剪切速率和温度的增加而下降．因此在 PPC成型加工中可采用升高加工温度和剪切速率的方法来提高其熔体的流动性．
이용차시소묘량열분석의、열중분석의、전자랍력궤、용체류동속솔의화모세관류변의등대취갑기을탱탄산지（PPC）적열성능、역학성능화용융류변행위진행료연구．결과표명：PPC 구유교저적파리화전변온도（Tg ）화열분해온도（Td ），Tg 화실중솔5％적 Td 분별위31℃화211．3℃；PPC 적역학성능교차，기랍신강도화단렬신장솔분별위7．50 MPa 화536．63％，용체류동속솔수온도제고이유소승고；PPC 용체위가소성류체，기용체표관점도수전절속솔화온도적증가이하강．인차재 PPC성형가공중가채용승고가공온도화전절속솔적방법래제고기용체적류동성．
The thermal property,mechanical property and rheological properties of poly(propylene carbon-ate)were studied by differential scanning calorimetry,thermo gravimetric analyzer,electronic tensile ma-chine,melt flow rate instrument and capillary rheometer,respectively.The results showed that PPC had a lower glass transition temperature(Tg )and thermal decomposition temperature(Td ),the glass transition temperature and temperatures of weight loss ratio at 5% were 31 ℃ and 211.3 ℃ respectively;the me-chanical properties of PPC was low,the tensile strength and elongation at break were 7.50 MPa and 536.63% respectively,the melt flow rate increased with the temperature;PPC was pseudoplastic fluid,and the melt apparent viscosity decreased with increasing shear rate and temperature.Thus,the flowability of PPC melt could be improved by increasing temparature and shear rate during its preparation.