| 丁腈橡胶/低聚合度聚氯乙烯共混胶性能的研究 |
| Study on Properties of NBR/Low Polymerization Degree PVC Blends |
| 投稿时间：2022-12-19 修订日期：2022-12-19 |
| DOI：10.12136/j.issn.1000-890X.2024.08.0583 |
| 中文关键词: 低聚合度聚氯乙烯 丁腈橡胶 机械共混 物理性能 动态力学性能 |
| 英文关键词: low polymerization degree PVC NBR mechanical blending physical property dynamic mechanical property |
| 基金项目:科技部重点专项项目（ 2018YFB1403800 ； 2018YFB1403803 ） |
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| 中文摘要: |
| 采用机械共混法制备中高丙烯腈含量丁腈橡胶（NBR）/低聚合度聚氯乙烯（PVC）共混胶，研究NBR/PVC共混比和增塑剂DOTP用量对NBR/PVC共混胶性能的影响。结果表明：与NBR胶料相比，NBR/PVC共混胶的t90显著延长；随着PVC用量的增大，NBR/PVC共混胶的t10延长，交联密度降低，定伸应力提高，拉伸强度和拉断伸长率先提高后降低，损耗峰向高温方向移动，玻璃化温度升高，在室温下的阻尼性能明显改善；NBR与PVC以不同共混比共混均可得到均相体系；随着增塑剂DOTP用量的增大，NBR/PVC共混胶的t10和t90呈延长趋势，硫化速度呈减慢趋势，交联密度、物理性能和阻尼性能降低。 |
| 英文摘要: |
| A mechanical blending method was used to prepare the blend of nitrile -butadiene rubber（NBR） with medium to high acrylonitrile content and low polymerization degree polyvinyl chloride（PVC），and the effects of NBR/PVC blending ratio and plasticizer DOTP dosage on the properties of NBR/PVC blend were studied.The results showed that，the t90 of NBR/PVC blend was significantly prolonged compared with NBR compound.With the increase of PVC dosage，the t10 of NBR/PVC blend was prolonged，the crosslinking density decreased，tensile stress at a given elongation increased，tensile strength and elongation at break first increased and then decreased，the loss peak moved toward to high temperature direction，the glass transition temperature increased，and the damping performance at room temperature was significantly improved.The homogeneous systems could be obtained by blending NBR with low polymerization degree PVC at different blending ratios.With the increase of plasticizer DOTP dosage，the t10 and t90 of NBR/PVC blend had an extended trend，the crosslinking density，physical properties and damping performance decreased. |
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