| SYNERGISTIC MODIFICATION OF EPDM AND CROSSLINKING AGENT IN IMMISCIBLE BLENDS OF POLYVINYL CHLORIDE WITH LOW DENSITY POLYETHYLENE |
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| 引用本文： | Zheng-ping Fang Guo-wei Ma Yu-zheng Xu Li-fang Tong. SYNERGISTIC MODIFICATION OF EPDM AND CROSSLINKING AGENT IN IMMISCIBLE BLENDS OF POLYVINYL CHLORIDE WITH LOW DENSITY POLYETHYLENE[J]. 高分子科学, 2006, 0(2): 147-154 |
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| 作者姓名： | Zheng-ping Fang Guo-wei Ma Yu-zheng Xu Li-fang Tong |
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| 作者单位： | Institute of Polymer Composites, Zhejiang University, Hangzhou 310027, China |
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| 摘 要： | The synergism of ethylene-propylene-diene monomer copolymer （EPDM） and dicumyl peroxide （DCP, a crosslinking agent） in low density polyethylene （LDPE）/poly（vinyl chloride） （PVC） blends was investigated. When EDPM and DCP are added to the blends simultaneously, the tensile properties could be improved significantly, especially for the blends with LDPE matrix. For example, incorporation of 10/1 （mass ratio） EPDM/DCP improves the tensile strength of the LDPE/PVC （mass ratio 80/20） blend from 7.9 MPa to 8.5 MPa and the elongation at break from 25% to 503%. Results from selective extraction, phase-contrast microscopy and thermal analysis reveal that the improvement in the tensile properties of the blends with LDPE matrix is principally due to the formation of a fine crosslinking network of the LDPE and EPDM phase. The outstanding modification effect of EPDM is explained by its dual functions： molecular entanglement with LDPE and the enhanced efficiency of DCP in the blends.
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| 关 键 词： | 协同改性 聚氯乙烯 聚乙烯 乙烯-丙烯-二烯烃共聚体 交联 |
| 收稿时间： | 2005-04-04 |
| 修稿时间： | 2005-06-20 |
SYNERGISTIC MODIFICATION OF EPDM AND CROSSLINKING AGENT IN IMMISCIBLE BLENDS OF POLYVINYL CHLORIDE WITH LOW DENSITY POLYETHYLENE |
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| Zheng-ping Fang,Guo-wei Ma,Yu-zheng Xu,Li-fang Tong. SYNERGISTIC MODIFICATION OF EPDM AND CROSSLINKING AGENT IN IMMISCIBLE BLENDS OF POLYVINYL CHLORIDE WITH LOW DENSITY POLYETHYLENE[J]. Chinese Journal of Polymer Science, 2006, 0(2): 147-154 |
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| Authors: | Zheng-ping Fang Guo-wei Ma Yu-zheng Xu Li-fang Tong |
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| Affiliation: | Institute of Polymer Composites, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The synergism of ethylene-propylene-diene monomer copolymer (EPDM) and dicumyl peroxide (DCP, a crosslinking agent) in low density polyethylene (LDPE)/poly(vinyl chloride) (PVC) blends was investigated. When EDPM and DCP are added to the blends simultaneously, the tensile properties could be improved significantly, especially for the blends with LDPE matrix. For example, incorporation of 10/1 (mass ratio) EPDM/DCP improves the tensile strength of the LDPE/PVC (mass ratio 80/20) blend from 7.9 MPa to 8.5 MPa and the elongation at break from 25% to 503%. Results from selective extraction, phase-contrast microscopy and thermal analysis reveal that the improvement in the tensile properties of the blends with LDPE matrix is principally due to the formation of a fine crosslinking network of the LDPE and EPDM phase. The outstanding modification effect of EPDM is explained by its dual functions: molecular entanglement with LDPE and the enhanced efficiency of DCP in the blends. |
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| Keywords: | Polyvinyl chloride Polyethylene EPDM Blend Crosslinking |
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