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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. shu

Studies on Morphology and Mechanical Properties of LLDPE/SAN Blend Compatibilized by EAA

Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received Date: 22 October 1997
Revised Date: 16 February 1998

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(C_s), that is, the point of inter facial saturation on the SAN phase, is reached. When c is much higher than C_s, 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.
- linear low-density polyethylene,
- styrene-acrylonitrile copolymer,
- blend,
- ethyleneacrylic acid copolymer,
- compatibilization
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