文章摘要
三元乙丙橡胶/氯丁橡胶共硫化阻燃橡胶的制备及性能
Preparation and Properties of Co-Vulcanized Ethylene-Propylene-Diene Monomer/Chloroprene Flame Retardant Rubber
  
DOI:10.16865/j.cnki.1000-7555.2018.03.007
中文关键词: 三元乙丙橡胶  氯丁橡胶  共硫化  相容性  阻燃性
英文关键词: ethylene-propylene-diene monomer  chloroprene rubber  co-vulcanization  compatibility  flame retardancy
基金项目:国家重点研发计划项目(2016YFE0102700);国家自然科学基金资助项目(51603194)
作者单位
王 超1,史 睿2,丁政茂3,郝晓宇1 1. 中北大学 材料科学与工程学院,山西 太原 030051
2. 北方自动控制技术研究所,山西 太原 030006
3. 北京理工大学 材料学院,北京 100081 
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中文摘要:
      采用一步模压法制备了三元乙丙橡胶/氯丁橡胶(EPDM/CR)共硫化阻燃橡胶,并用转子流变仪、动态力学分析仪和扫描电子显微镜研究了EPDM 相与CR相的硫化速率、交联密度、分子链运动性和相容性与共混胶力学性能及微观形貌之间的联系。结果表明,通过改变促进剂乙撑硫脲(Na-22)和二硫化四甲基秋兰姆(TMTD)的含量,均能有效地减小EPDM 相与CR相硫化速率和交联密度的差值,改善两相的共硫化性,从而提高两相的相容性。改变相容剂马来酸酐接枝三元乙丙橡胶(EPDM-g-MAH)的含量,能够有效地改善EPDM 与CR的相容性,但会降低EPDM/CR的硫化速率和交联密度,损害两相的共硫化性。在Na-22、TMTD 和EPDM-g-MAH 的添加量分别为1.50phr、2.10phr和10.00phr时,EPDM/CR硫化胶的拉伸断面平整,出现了明显的脊柱线,其拉伸强度、断裂伸长率和撕裂强度分别为17.84MPa,483.75%和28.38kN/m。
英文摘要:
      Co-vulcanized ethylene-propylene-diene monomer/chloroprene (EPDM/CR) flame retardant rubber was prepared by one step compression molding. The relationship of vulcanization rate, crosslink density and molecular chain mobility, compatibility of EPDM phase and CR phase with mechanical properties and morphology of blends were studied by rotorless rheometer, DMA and SEM. The results show that changing the contents of accelerator ethylene thiourea (ETU∶Na-22) and tetramethyl thiuram disulfide (TMTD), the differences of vulcanization rate and crosslinking density between EPDM and CR phases are effectively reduced, that can improve the co-vulcanization and compatibility of two-phase. By changing the content of compatibilizer maleic anhydride grafted ethylene-propylene-diene monomer (EPDM-g-MAH), the compatibility of EPDM and CR phases is effectively improved, but the vulcanization rate and crosslinking density of EPDM/CR are reduced. When the content of Na-22, TMTD and EPDM-g-MAH is 1.50 phr, 2.10 phr and 10.00 phr respectively, the mechanical properties of EPDM/CR vulcanizate are optimized, especially the tensile strength is 17.84 MPa, the elongation at break is 483.75% and the tearing strength is 28.38 kN/m.
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