马城华,陈颖,常文哲,李彦钧
MA Cheng-hua,CHEN Ying,CHANG Wen-zhe,LI Yan-jun

• 1:辽阳石化分公司

摘要(Abstract)：

通过力学性能测试、差示扫描量热分析(DSC)和热失重分析等测试手段研究了聚酯(PET)改性料的湿热老化性能,结果表明:复合助剂的加入能显著提升体系的力学性能保持率,进而提升其湿热老化性能,提升的幅度随复合助剂中抗水解助剂含量的增加而显著增加;DSC分析表明复合助剂的引入起到促结晶的作用。PET改性料的湿热老化与结晶度的关系研究结果表明:湿热老化能提高PET改性料体系的结晶度,从而使得其力学韧性丧失,导致材料宏观的脆韧转变。
Mechanical test,differential scanning calorimetry(DSC) and thermogravimetry(TGA) were uti-lized to study the damp-heat(DH) aging behavior and mechanism of modified polyester(PET).The resultsshowed that the incorporation of anti-hydrolysis additive could greatly enhance the mechanical retentionrate and prolong the service life after DH aging.And better anti-aging properties were obtained with highercontent of additive.Besides,the effect of DH aging on crystallization was investigated.It was indicated fromDSC analysis that anti-hydrolysis additive could promote the crystallization degree,thus sacrificed tough-ness and resulted in obvious brittle-ductile transition.

关键词(KeyWords)： PET;湿热老化;抗水解剂;结晶度
PET,DH aging,anti-hydrolysis additive,crystallization degree

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 马城华,陈颖,常文哲,李彦钧
MA Cheng-hua,CHEN Ying,CHANG Wen-zhe,LI Yan-jun

DOI: 10.16090/j.cnki.hcxw.2015.07.003

参考文献(References)：

• [1]Foulc M P,Bergeret A,Ferry L,et al.Study of hygrothermal ageing of glass fibre reinforced PET composites[J].Polymer Degradation and Stability,2005,89(3):461-470.
• [2]Kanuga K.Degradation of polyester film exposed to accelerated indoor damp heat aging[C].Photovoltaic Specialists Conference(PVSC),201137th IEEE,2011:96-100.
• [3]肖迎红,Anne Bergeret,Marie-Pierre Foulcmp.PET的湿热老化性能研究[J].塑料科技,2001,8(4):22-24.
• [4]Chris Sammona,Jack Yarwooda,Neil Everallb.A FT-IR study of the effect of hydrolytic degradation on the structure of thin PET films[J].Polymer Degradation and Stability,2000,67(1):149-158.
• [5]成宏,杨昌正.2-乙烯基-2-噁唑啉的合成及聚合[J].湖南化工,1998,28(2):20-22.
• [6]Wang Yan-ping,Wang Yi-min,HE Wei-bo.Hydrolysis resistant polyethylene terephthalate(PET)fiber[J].Journal of Donghua University Eng.Ed,2006,23:296-298.
• [7]刘春,蒋景阳,刘晓航.邻溴苯基-2-噁唑啉的合成研究[J].高等学校化学学报,1999,20(4):569-572.
• [8]邱高,黄南薰,唐志廉.PET熔融双峰的模拟分析[J].高分子材料科学与工程,1998,9(5):9-14.
• [9]于同隐,海山,张炜,等.聚对苯二甲酸乙二醇酯的熔融双峰[J].高分子通讯,1981,12(6):461-467.
• [10]何曼君,陈维孝,董西侠.高分子物理[M].复旦大学出版社,1993.