再生高密度聚乙烯/协同表面改性滑石粉复合材料力学性能与结晶性能研究
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摘要
为增强增韧再生高密度聚乙烯(RHDPE),采用钛酸酯偶联剂(TCA)和马来酸酐接枝聚乙烯(MAH-g-PE)对填料滑石粉(Talc)进行了协同表面改性,考察了改性剂的配比对RHDPE/Talc复合材料力学性能与结晶性能的影响。结果表明:当TCA、MAH-g-PE的含量分别为Talc的0.5%和40%时,RHDPE/Talc复合材料的拉伸强度增幅最大;当TCA、MAH-g-PE的含量分别为Talc的1.0%和16%时,复合材料的弯曲强度增幅最大。随着MAH-g-PE含量的增加,RHDPE/Talc复合材料的熔融温度提升、结晶度增大;而加快升降温速率,则会使复合材料的熔融温度升高、结晶温度下降,同时导致晶区紊乱、结晶粒径差异增大。
In order to enhance and toughen high density polyethylene(RHDPE), the talcum powder(Talc) was synergetic surface modifi ed by titanate coupling agent(TCA) and maleic anhydride grafted polyethylene(MAH-g-PE) with different ratios. The mechanical properties and crystallinity of the RHDPE/Talc composites were researched. The results show that: the tensile strength increases to the largest when the contents of TCA and MAH-g-PE(relative to the weight of Talc) are 0.5% and 40%, respectively; and the flexural strength increases to the largest when the contents of the TCA and MAH-g-PE(relative to the weight of Talc) are 1.0% and 16%, respectively. The melting temperature and the crystallinity of RHDPE/Talc composites improve with the increasing content of MAH-g-PE. Moreover, with the accelerating of the heating and cooling speed, the melting temperature raises, the crystallization temperature deduces, the crystalline disorder and the inconsistency of crystal sizes appears.
In order to enhance and toughen high density polyethylene(RHDPE), the talcum powder(Talc) was synergetic surface modifi ed by titanate coupling agent(TCA) and maleic anhydride grafted polyethylene(MAH-g-PE) with different ratios. The mechanical properties and crystallinity of the RHDPE/Talc composites were researched. The results show that: the tensile strength increases to the largest when the contents of TCA and MAH-g-PE(relative to the weight of Talc) are 0.5% and 40%, respectively; and the flexural strength increases to the largest when the contents of the TCA and MAH-g-PE(relative to the weight of Talc) are 1.0% and 16%, respectively. The melting temperature and the crystallinity of RHDPE/Talc composites improve with the increasing content of MAH-g-PE. Moreover, with the accelerating of the heating and cooling speed, the melting temperature raises, the crystallization temperature deduces, the crystalline disorder and the inconsistency of crystal sizes appears.
引文
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[3]尹智生,丁磊,杜建强,等.高密度聚乙烯管材国内外应用开发现状[J].石化技术,1997,4(3):187-190.
[4]水恒毅,王益龙,贾振强,等.用DSC精确测量聚乙烯压力管道的化学材质[J].化学建材,2009,25(5):1-4.
[5]Karrad S,Lopez Cuesta J M,Crespy A.Influence of a fine talc on the properties of composites with HDPE and polyethylene/polystyrene blends[J].Journal of materials science,1998,33:453-461.
[6]曹建国,高雪芹,申开智.串晶结构对自增强HDPE短期力学性能和耐慢速裂纹扩展性能的影响[J].四川大学学报,2012,44(5):200-206.
[7]许民,陶红梅,陈磊,等.偶联剂含量对植物纤维/高密度聚乙烯复合材料力学性能的影响[J].东北林业大学学报,2007,35(10):33-35.
[8]栾晓春.木粉增强HDPE复合材料的制备及其性能研究[J].辽宁化工,2005,34(6):241-243.
[9]李文莲,王正祥,谢安全.滑石粉/碳酸钙增强增韧高密度聚乙烯的研究[J].包装工程,2010,31(5):35-38.
[10]黄虹,王选伦,明浩.相容剂PE-g-MAH对HDPE/CF复合材料力学性能的影响[J].塑料科技,2014,42(7):75-78.
[11]Turunen M,Alvila L,Pakkanen T T,et al.Modification of phenol-formaldehyde resol resins by lignin,starch,and urea[J].Journal of Applied Polymer Science,2003,88(2):582-588.
[12]王玉海,沈浩,麦堪成.大分子相容剂改性纳米CaCO3/PP复合材料的非等温结晶行为[J].复合材料学报,2006,23(6):15-16.
[13]唐谊平,李建新,黄子阳,等.管道防腐用高密度聚乙烯的非等温结晶行为[J].合成树脂及塑料,2009,26(5):72-73.
[14]施燕琴,钟明强,陈枫,等.水滑石及相容剂对聚丙烯结晶性能的影响[J].高分子材料科学与工程,2010,26(11):48-50.
[15]王瑞元,陈晓东,徐群杰,等.滑石粉对PET结晶及力学性能的影响[J].上海电力学院学报,2014,30(1):79-83.
[16]崔正,张宜鹏,张胜,等.PET/滑石粉复合材料结晶性能、热性能和力学性能研究[J].中国塑料,2009,23(11):15-20.