广东化工
廣東化工
엄동화공
GUANGDONG CHEMICAL INDUSTRY
2012年
6期
68-70
,共3页
聚乳酸(PLA)%聚氧化乙烯(PEO)%共混,结晶
聚乳痠(PLA)%聚氧化乙烯(PEO)%共混,結晶
취유산(PLA)%취양화을희(PEO)%공혼,결정
polylactide%poly(ethylene oxide)%composites%crystallization
共沉积技术制备了聚乳酸（PLA）/聚氧化乙烯（PEO）共混物,通过DMA和相差显微镜考察了共混物的相行为。用DSC研究了PLA/PEO共混物的结晶形貌及其动力学,由于部分相容的熔融态PEO提高了PLA分子链的运动能力,导致显著促进了PLA的结晶速率;结合偏光显微镜（POM）观察分析,结晶速率的提高源于结晶生长速率的促进,而且在低的结晶温度时的结晶速率的增加更为明显。
共沉積技術製備瞭聚乳痠（PLA）/聚氧化乙烯（PEO）共混物,通過DMA和相差顯微鏡攷察瞭共混物的相行為。用DSC研究瞭PLA/PEO共混物的結晶形貌及其動力學,由于部分相容的鎔融態PEO提高瞭PLA分子鏈的運動能力,導緻顯著促進瞭PLA的結晶速率;結閤偏光顯微鏡（POM）觀察分析,結晶速率的提高源于結晶生長速率的促進,而且在低的結晶溫度時的結晶速率的增加更為明顯。
공침적기술제비료취유산（PLA）/취양화을희（PEO）공혼물,통과DMA화상차현미경고찰료공혼물적상행위。용DSC연구료PLA/PEO공혼물적결정형모급기동역학,유우부분상용적용융태PEO제고료PLA분자련적운동능력,도치현저촉진료PLA적결정속솔;결합편광현미경（POM）관찰분석,결정속솔적제고원우결정생장속솔적촉진,이차재저적결정온도시적결정속솔적증가경위명현。
The polylactide（PLA）/poly（ethylene oxide）（PEO）composites were prepared by coagulation method and the phase behavior were well characterized by DMA and Phase contrast microscope measurements.Isothermal crystallization kinetics of neat PLA and PLA/PEO composites were further investigated by using polarized optical microscope（POM） and DSC measurements to clarify the effects of PEO of different temperature on PLA.DSC measurements showed that PEO enhance PLA crystallization growth rate in comparison with the case of neat PLA,crystallization rate improved significantly at lower crystallization temperature,this can be attribute to the mobility increased by partly miscible melt PEO.
