| 不同牌号氯丁橡胶的微观结构分析 |
| Microstructure Analysis of Different Grades of CR |
| 投稿时间：2024-03-29 修订日期：2024-03-29 |
| DOI：10.12136/j.issn.1000-890X.2026.04.0298 |
| 中文关键词: 氯丁橡胶 结构单元含量 相对分子质量 门尼粘度 玻璃化转变温度 凝胶含量 |
| 英文关键词: CR structure unit content molecular weight Mooney viscosity glass transition temperature gel content |
| 基金项目:国家自然科学基金资助项目（52103058）；山东省自然科学基金资助项目（ZR2021QE104）；华南理工大学聚合物成型加工工程教育部重点实验室开放课题（KFKT2301） |
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| 中文摘要: |
| 通过核磁共振氢谱、凝胶渗透色谱、差示扫描量热等分析手段，研究并对比国内外4个牌号氯丁橡胶（CR）[进口S40V和国产SN212，SN232，213-2]的微观结构，对CR的分子结构单元含量、相对分子质量及其分布、门尼粘度、塑性、玻璃化转变温度等进行系统表征。结果表明：S40V与213-2的分子各结构单元含量接近；S40V的重均相对分子质量较大，相对分子质量分布较宽，门尼粘度较小，塑性较好；SN212和213-2的相对分子质量分布较窄，门尼粘度较大；SN232的门尼粘度小，塑性好，玻璃化转变温度与S40V接近；213-2的分子1，2-结构和3，4-结构含量较高，结晶度小；在国产3个牌号CR中，SN232的加工性能与进口S40V最为接近。 |
| 英文摘要: |
| The microstructures of four grades of chloroprene rubber（CR） at home and abroad （imported S40V and domestic SN212，SN232，213-2） were studied and compared by means of nuclear magnetic resonance hydrogen spectrum，gel permeation chromatography，differential scanning calorimetry and other analysis methods.The molecular structure unit contents，molecular weights and their distribution，Mooney viscosities，plasticities and glass transition temperatures of CR were systematically characterized.The results showed that，the molecular structure unit contents of S40V were close to those of 213-2.S40V had larger weight average molecular weight and wider molecular weight distribution，lower Mooney viscosity，and better plasticity.SN212 and 213-2 had narrower molecular weight distribution and higher Mooney viscosity.SN232 had lower Mooney viscosity，better plasticity，and similar glass transition temperature to S40V.213-2 had higher 1，2-structure and 3，4-structure contents，lowest crystallinity.Among the three domestic grades of CR，the processing performance of SN232 were the closest to that of imported S40V. |
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