引用本文:
徐胜清, 刘卫东, 董丽杰, 黄葆同. EAA增容LLDPE/SAN共混物的形态及力学性能[J]. 应用化学,
1998, 15(4): 49-53.
Citation: Xu Shengqing, Liu Weidong, Deng Lijie, Huang Baotong. Studies on Morphology and Mechanical Properties of LLDPE/SAN Blend Compatibilized by EAA[J]. Chinese Journal of Applied Chemistry, 1998, 15(4): 49-53.
Citation: Xu Shengqing, Liu Weidong, Deng Lijie, Huang Baotong. Studies on Morphology and Mechanical Properties of LLDPE/SAN Blend Compatibilized by EAA[J]. Chinese Journal of Applied Chemistry, 1998, 15(4): 49-53.
EAA增容LLDPE/SAN共混物的形态及力学性能
摘要:
采用SEM及力学性能测试等方法,研究了乙烯-丙烯酸共聚物(EAA)含量对其增容线性低密度聚乙烯(LLDPE)/苯乙烯-丙烯腈共聚物(SAN)共混物形态及性能的影响.发现少量的EAA可使共混物中SAN相的相尺寸减小,共混物模量、拉伸强度及断裂伸长率提高.当EAA的含量增加至11.7%时,它在共混物中两相界而的分布达到饱和,即增容剂饱和浓度Cs=11.7%;此时,共混物形态及性能的变化趋势出现明显转折.明显过量的EAA主要起增韧作用.EAA的增容机理为,它与LLDPE组分的非晶区可部分相容,同时又与SAN相存在着分子间特殊作用.
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关键词:
- 线性低密度聚乙烯
- / 苯乙烯-丙烯腈共聚物
- / 共混物
- / 乙烯-丙烯酸共聚物
- / 增容作用
English
Studies on Morphology and Mechanical Properties of LLDPE/SAN Blend Compatibilized by EAA
Abstract:
The influence of the amount of ethylene-acrylic acid random copolymer(EAA) on morphology and mechanieal properties of linear low-desnity polyethylene (LLDPE)/styrene-acrylonitrile copolymer (SAN) blends compatibilized by EAA was studied by SEM and me-chanical properties measurements. The results show that the addition of a small amount of EAA leads to a decrease in domain size of the SAN phase and an increase in modulus, tensile strength and elongation at break. When the amount of EAA(c) is up to about 11.7% (mass fraction), the saturated concentration(Cs), that is, the point of inter facial saturation on the SAN phase, is reached. When c is much higher than Cs, the excess EAA acts mainly as a toughening agent of the LLDPE/SAN blends. The compatibilizing effect of EAA is due to partial compatibility of the amorphous phases of EAA and LLDPE, and the specific interaction between EAA and SAN.
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