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《CHINA RUBBER INDUSTRY》 1994-01
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Application of Compatibiliser in EPDM/Polyamide Blends

Zhang Xiangfu, Zhang Yinxi, Zheng Haiou and Zhu Yutang (Shanghai Jiaotong University, Shanghai)  
By the initiation of a rubber accelerator, grafting of maleic anhydride (MA) onto EPDM was accomplished to form a copolymer which serves as a compatibiliser for EPDM/polyamide (PA) blends. The MA grafting reactions on EPDM were carried out under various experimental conditions. It is shown that as the amount of EPDM-g-MA increases from 0 to 14 wt% based on total rubber, the tensile strentgth increases from 4MPa to 12MPa and solvent resistance is greatly improved too. SAM photos indicate that the polyamide particles in EPDM/EPDM-g-MA/PA blends are much smaller than that in EPDM/PA blends. Differential scanning calorimetry (DSC) measurement shows that EPDM/EPDM-g-MA/PA blends have two glass transition temperatures, 45. 2℃ and 48℃, corresponding to the Tg of EPDM and PA. Therefore the EPDM/EPDM-g-MA/PA vulcanisates are multiphase systems.
【CateGory Index】: TQ334.9
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