动态固化对玻纤增强PP复合材料性能的影响
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摘要
研究了环氧树脂(EP)、酚醛树脂(PF)对玻纤增强聚丙烯复合材料性能的影响。结果表明,单纯加入EP或PF,对复合材料力学性能的影响较小;同时加入EP和PF时,体系的力学性能及热性能显著提高。与单纯加入的方式相比,同时加入EP/PF,体系的流动性快速降低,实现了EP/PF的动态固化。拉伸疲劳测试表明,EP/PF动态固化网络可以有效延缓银纹或裂纹的扩展,复合材料的疲劳性能显著提高; S-N曲线表明,随着拉伸应力的提高,疲劳寿命逐渐下降,当拉伸应力在46～57. 5 MPa时,复合材料疲劳寿命呈现出突变现象。通过扫描电子显微镜(SEM)观察了材料断面的微观形貌,结果表明,EP/PF同时加入可以有效提高玻纤与树脂基体间的界面强度。
The effects of epoxy( EP) and phenoy resin( PF) on the properties of glass fiber reinforced polypropylene composite were studied. The results showed that individual introduction of EP or PF didn 't have significantly effect on the mechanical properties of the reinforced composite; however,the mechanical and thermal properties were noticeably improved when EP and PF were synergistically added. Compared with individual introduction,the combination of EP and PF in the composite resulted in a sharply decreasing of flowability,the result indicated that the dynamically curing was achieved between EP and PF. Tensile fatigue testing indicated that the dynamically curing networks could effectively postpone the crack propagation,and fatigue property of the composite was significantly improved; S-N curve illustrated that fatigue time showed a gradually reducing with the increasing of tensile stress,moreover,a remarkably declining of fatigue time came out in the range from 46 to 57. 5 MPa of tensile stress. Scanning electron microscope( SEM) images demonstrated that synergistical introduction of EP and PF could effectively enhance the interfacial bonding strength of glass fiber and matrix resin.
The effects of epoxy( EP) and phenoy resin( PF) on the properties of glass fiber reinforced polypropylene composite were studied. The results showed that individual introduction of EP or PF didn 't have significantly effect on the mechanical properties of the reinforced composite; however,the mechanical and thermal properties were noticeably improved when EP and PF were synergistically added. Compared with individual introduction,the combination of EP and PF in the composite resulted in a sharply decreasing of flowability,the result indicated that the dynamically curing was achieved between EP and PF. Tensile fatigue testing indicated that the dynamically curing networks could effectively postpone the crack propagation,and fatigue property of the composite was significantly improved; S-N curve illustrated that fatigue time showed a gradually reducing with the increasing of tensile stress,moreover,a remarkably declining of fatigue time came out in the range from 46 to 57. 5 MPa of tensile stress. Scanning electron microscope( SEM) images demonstrated that synergistical introduction of EP and PF could effectively enhance the interfacial bonding strength of glass fiber and matrix resin.
引文
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[20]金日光,华幼卿.高分子物理[M]. 3版.北京:化学工业出版社,2007.
[2]吴玫颖,郑国强,韩文娟.玻纤增强聚丙烯复合材料的界面及性能研究[J].塑料制造,2010(5):64-66.
[3]杨青海,梁珊,陈兴江,等.聚丙烯/短玻璃纤维复合材料性能研究[J].塑料科技,2014,42(6):48-51.
[4]线欢欢,敖玉辉,冯芳,等.不同交联剂对动态硫化PP/EPDM共混物的影响[J].塑料,2014,43(3):55-57.
[5]吴建国,杨晓华.动态硫化聚丙烯复合材料的制备[J].塑料,2001,30(1):49-52.
[6]许军,朱晨,吴瑶,等. PP/EPOXY合金结构和性能的研究[J].中国民航大学学报,2008,26(1):50-55.
[7]江学良,孙康,张勇,等.增容作用和动态固化对聚丙烯/环氧树脂共混物形态结构的影响[J].高分子材料科学与工程,2006,22(1):91-94.
[8]黄俊峰.异氰脲酸三缩水甘油脂的合成及应用[J].涂料工业,2009,39(7):68-71.
[9] BEYER H,SAJI,SZEGEDI,et al. Morphology and crystallinity of the two diastereomer racemates of triglycidyl isocyanurate(TGIC)[J]. European Polymer Journal,2007,43(6):2350-2356.
[10]杨诗润,梁珊,罗筑,等.长玻璃纤维增强聚丙烯复合材料的力学性能研究[J].塑料工业,2012,40(6):37-40.
[11]崔丽梅.动态固化聚丙烯/酚醛树脂共混物结构与性能的研究[D].上海:上海交通大学,2007.
[12]武俊,郁文娟,王玮,等.动态固化增容聚丙烯/长玻璃纤维复合材料的研究[J].塑料,2009,38(5):83-85.
[13]王春林,杨其,吴冬生,等.聚丙烯/环氧树脂复合材料制备及其性能研究[J].塑料科技,2008,36(11):60-64.
[14] CHIOU K,CHANG F. Reactive compatibilization of polyamide-6(PA6)/polybutylene terephthalate(PBT)blends by a multifunctional epoxy resin[J]. Journal of Polymer Science Part B:Polymer Physics,2000,38(1):23-33.
[15]金自游,任文坛,彭宗林,等.动态硫化增韧聚丙烯/三元乙丙橡胶共混物的研究[J].中国塑料,2006,20(1),25-30.
[16] SHIEH Y,LIAO T,CHANG F. Reactive compatibilization of PP/PBT blends by a mixture of PP-g-MA and epoxy resin[J]. Journal of Applied Polymer Science,2001,79(12):2272-2285.
[17]宋科,杨邦成,梁亚运.改性聚丙烯疲劳性能及其微观形态的研究[J].塑料工业,2015,43(9):33-36.
[18]刘亚庆.玻纤增强尼龙66疲劳性能的研究[J].工程塑料应用,2002,30(8):43-44.
[19]李艳红,陈宏书,郑建龙,等.高分子材料疲劳行为的研究[J].化学催进剂与高分子材料,2008,6(2):54-57.
[20]金日光,华幼卿.高分子物理[M]. 3版.北京:化学工业出版社,2007.