工程塑料应用
工程塑料應用
공정소료응용
ENGINEERING PLASTICS APPLICATION
2014年
5期
93-98
,共6页
聚对苯二甲酸乙二酯%成核剂%晶体形态%力学性能
聚對苯二甲痠乙二酯%成覈劑%晶體形態%力學性能
취대분이갑산을이지%성핵제%정체형태%역학성능
PET%nucleation agent%crystal morphology%mechanical property
通过高温下聚对苯二甲酸乙二酯(PET)熔体的结晶速率常数和球晶出现时间研究了不同成核剂对成核速率的影响，利用偏光显微镜、X射线衍射分析了成核剂对晶体形态的影响，结合退火处理研究了晶粒尺寸、成核剂对PET力学性能的影响。结果表明，成核剂的加入起到了快速成核和晶粒细化的效果，提高了材料的拉伸强度与缺口冲击强度，其中0.5%的成核剂Aclyn对PET的增韧改性效果最好，可使冲击强度增大2.2倍，同时使拉伸强度增大1.9倍。样品退火处理2 h后由于晶粒尺寸的增大其缺口冲击强度下降34%。
通過高溫下聚對苯二甲痠乙二酯(PET)鎔體的結晶速率常數和毬晶齣現時間研究瞭不同成覈劑對成覈速率的影響，利用偏光顯微鏡、X射線衍射分析瞭成覈劑對晶體形態的影響，結閤退火處理研究瞭晶粒呎吋、成覈劑對PET力學性能的影響。結果錶明，成覈劑的加入起到瞭快速成覈和晶粒細化的效果，提高瞭材料的拉伸彊度與缺口遲擊彊度，其中0.5%的成覈劑Aclyn對PET的增韌改性效果最好，可使遲擊彊度增大2.2倍，同時使拉伸彊度增大1.9倍。樣品退火處理2 h後由于晶粒呎吋的增大其缺口遲擊彊度下降34%。
통과고온하취대분이갑산을이지(PET)용체적결정속솔상수화구정출현시간연구료불동성핵제대성핵속솔적영향，이용편광현미경、X사선연사분석료성핵제대정체형태적영향，결합퇴화처리연구료정립척촌、성핵제대PET역학성능적영향。결과표명，성핵제적가입기도료쾌속성핵화정립세화적효과，제고료재료적랍신강도여결구충격강도，기중0.5%적성핵제Aclyn대PET적증인개성효과최호，가사충격강도증대2.2배，동시사랍신강도증대1.9배。양품퇴화처리2 h후유우정립척촌적증대기결구충격강도하강34%。
The effect of additives on the nucleating rate of PET melt was studied by the crystallization rate parameter and the appearance time of spherulites.The crystal morphology of PET/nucleation agents was measured by polarizing optical microscopy and X-ray diffraction.Combined the annealing treatment,the effects of grain size and nucleation agent on the mechanical properties of PET were studied.The results showed that rapid nucleation of melted PET caused by nucleating agent resulted in the decrease in grain size and both the notched impact and tensile strength of PET were improved.Aclyn was the most effective nucleation agent on toughening modification of PET,the impact strength and the tensile strength increased 3.2 times and 2.9 times respectively when the content of Aclyn was 0.5%.The notched impact strength of sample decreased 34% due to the increase of grain size caused by annealing for 2 hours.
