STRESSINDUCED FUNCTIONALIZED EPDM/HDPE AND ITS EFFECTS ON MORPHOLOGY AND MECHANICAL PROPERTIES OF PA66/EPDM/HDPE BLENDS

ZHANG  Ling; ZHANG  Yuncan; YAO  Huqing

doi:10.3724/SP.J.1105.2011.09321

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STRESSINDUCED FUNCTIONALIZED EPDM/HDPE AND ITS EFFECTS ON MORPHOLOGY AND MECHANICAL PROPERTIES OF PA66/EPDM/HDPE BLENDS

Research Article | 更新时间：2021-03-19

- STRESSINDUCED FUNCTIONALIZED EPDM/HDPE AND ITS EFFECTS ON MORPHOLOGY AND MECHANICAL PROPERTIES OF PA66/EPDM/HDPE BLENDS
- Acta Polymerica Sinica Issue 3, Pages: 246-253(2011)
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- DOI：10.3724/SP.J.1105.2011.09321
  CLC：
- Published：20 March 2011，
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ZHANG Ling, ZHANG Yuncan, YAO Huqing. STRESSINDUCED FUNCTIONALIZED EPDM/HDPE AND ITS EFFECTS ON MORPHOLOGY AND MECHANICAL PROPERTIES OF PA66/EPDM/HDPE BLENDS. [J]. Acta Polymerica Sinica (3):246-253(2011)
DOI：

ZHANG Ling, ZHANG Yuncan, YAO Huqing. STRESSINDUCED FUNCTIONALIZED EPDM/HDPE AND ITS EFFECTS ON MORPHOLOGY AND MECHANICAL PROPERTIES OF PA66/EPDM/HDPE BLENDS. [J]. Acta Polymerica Sinica (3):246-253(2011) DOI： 10.3724/SP.J.1105.2011.09321.

摘要

通过提高双螺杆挤出机螺杆转速的方法，研究了熔融挤出过程中高剪切应力对马来酸酐(MAH)官能化三元乙丙橡胶(EPDM)与高密度聚乙烯(HDPE)共混物的接枝率、熔体流动速率及凝胶含量的影响.随着双螺杆挤出机螺杆转速的增加，强烈的机械剪切应力引发EPDM/HDPE共混物大分子链的断链反应形成大分子自由基，从而引发接枝反应制得具有较高接枝率、较好熔体流动速率和较低凝胶含量的官能化产物(EPDM/HDPE)-g-MAH.并将(EPDM/HDPE)-g-MAH与PA66进行共混，研究了共混体系的相容性、相态及力学性能.结果表明，(EPDM/HDPE)-g-MAH的加入大大改善了PA66/EPDM/HDPE体系的相容性，且随其含量的增加，分散相的粒径明显降低.共混物的韧性及延展性大大提高，而其拉伸及弯曲性能基本保持良好，共混物的成本也有所下降.

Abstract

The functionalization reaction of ethylene-propylene-diene monomer rubber (EPDM) and high-density polyethylene (HDPE) with maleic anhydride (MAH) during melt extruding through the high shear stress induced initiation by increasing the screw rotation speed of twin-screw extruder and changing the reaction temperature was investigated.With increasing the screw rotation speed

the scission of EPDM and HDPE molecule chains can be caused to form macroradicals and the reaction of EPDM/HDPE with MAH can be realized.The functionalized product (EPDM/HDPE)-g-MAH with higher percentage of grafting and better melt flow rate and lower gel content was prepared.The effects of (EPDM/HDPE)-g-MAH as a compatilizer on the compatibility

morphology and the mechanical properties of PA66/EPDM/HDPE blends were studied.The results showed that (EPDM/HDPE)-g-MAH greatly improved the compatibility of the blends.With an increase in (EPDM/HDPE)-g-MAH content in the blend

the size of minor component domains decreased greatly.And the Izod impact strength and elongation at break of the blends improved obviously.

关键词

EPDM/HDPE共混物，高剪切应力，官能化，形态结构，力学性能

Keywords

EPDM/HDPE共混物

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