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JIA Shikui, ZHU Yan, WANG Zhong, et al. Influences of POE-g-MA on thermal and rheological properties of Nano-CaCO3/PLA composites[J]. Acta Materiae Compositae Sinica, 2017, 34(2): 256-262. DOI: 10.13801/j.cnki.fhclxb.20160427.002
Citation: JIA Shikui, ZHU Yan, WANG Zhong, et al. Influences of POE-g-MA on thermal and rheological properties of Nano-CaCO3/PLA composites[J]. Acta Materiae Compositae Sinica, 2017, 34(2): 256-262. DOI: 10.13801/j.cnki.fhclxb.20160427.002
shu

Influences of POE-g-MA on thermal and rheological properties of Nano-CaCO3/PLA composites

  • School of Materials Science and Engineering, Shaanxi Sci-Tech University, Hanzhong 723000, China

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  • Received Date: February 29, 2016
  • Revised Date: February 29, 2016
    Abstract
  • The nanometer calcium carbonate (Nano-CaCO3)/polylactic acid (PLA) composites was melt-compounded by twin-screw exturder with Nano-CaCO3 and PLA as raw materials,maleic anhydride grafted ethylene-octene copolymer (POE-g-MA) as compatibilizer.SEM,DSC,TG,capillary rheometer (CR) and universal testing machine were used to perform the interfacial compatibility,thermal properties,rheological properties and mechanical properties of Nano-CaCO3/PLA matrix composites,respectively.The results show that the aggregation phenomenon in the PLA matrix increases compared with pure PLA when the content of Nano-CaCO3 increases to 15wt%.The crystallinity,the maximum thermal decomposition temperature and the tensile strength of Nano-CaCO3/PLA composites decrease by 1.9%,15.5℃ and 28.2%,the flexural strength and elongation at break increase by 37.5% and 29.3%,respectively.And the interfacial compatibility of Nano-CaCO3/PLA composites with 4wt% POE-g-MA improves,the crystallinity and the tensile strength of sample decrease by 4.2% and 25.2%,the maximum thermal decomposition temperature,the flexural strength and elongation at break of sample increase by 5.8℃,25.3% and 174.4%,respectively.The shear viscosity of Nano-CaCO3/PLA composites increases due to thaddition of POE-g-MA.
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