CAJ | 학술논문

利用压力-体积-温度测量仪（ PVT），使等规聚丙烯在几个不同压力下进行非等温结晶，结合示差扫描量热仪（DSC）、在线小角X射线散射（SAXS）和广角X射线衍射（WAXD）等手段，研究了不同压力下聚丙烯的晶型转变及其熔融过程的晶体变化。结果发现，随压力增加，样品中γ晶型含量逐渐增加，α晶型减少；熔融升温过程中，样品的SAXS散射图谱（ I-s）始终显单一峰，推测认为在片晶结构中α晶型与γ晶型是混合形成的。
이용압력-체적-온도측량의（ PVT），사등규취병희재궤개불동압력하진행비등온결정，결합시차소묘량열의（DSC）、재선소각X사선산사（SAXS）화엄각X사선연사（WAXD）등수단，연구료불동압력하취병희적정형전변급기용융과정적정체변화。결과발현，수압력증가，양품중γ정형함량축점증가，α정형감소；용융승온과정중，양품적SAXS산사도보（ I-s）시종현단일봉，추측인위재편정결구중α정형여γ정형시혼합형성적。
A series of specimens of the isotactic polypropylene were obtained by non -isothermal crystallization at different pressures using the Pressure -Volume -Temperature ( PVT) instrument.Time resolved synchrotron small and wide angle X-ray scattering ( SAXS/WAXS) experiments, together with differential scanning calorimetry ( DSC) studies were carried out in order to study the crystal transfer during the non -isothermal crystallization process and their melting behavior.The results indicated that the content of γ-form crystallites increased with the pressure.During the melting process, all SAXS data showed a single peak , indicating that the internal structure of the specimens was periodically ordered.It was also found that long period increased with the temperature.Comparing the long period changes in different specimens , it was speculated that the α-form and γ-form crystallites were mixed together in the lamellae structure.