| 均匀化工艺参数对天然橡胶理化性能的影响 |
| Influence of Homogenization Process Parameters on Physicochemical Properties of NR |
| 投稿时间：2023-09-12 修订日期：2023-09-20 |
| DOI：10.12136/j.issn.1000-890X.2025.01.0053 |
| 中文关键词: 天然橡胶 均匀化 工艺参数 理化性能 |
| 英文关键词: NR homogenization process parameters physicochemical property |
| 基金项目: |
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| 摘要点击次数: 354 |
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| 中文摘要: |
| 对照GB/T 15340—2008的均匀化工艺，从开炼机辊温、辊距和过辊次数考察均匀化工艺参数对天然橡胶（NR）理化性能的影响，并验证优化均匀化方案的适用性。结果表明：在NR均匀化过程中，辊温对室温没有依赖性，室温不需严格控制；NR的理化性能对辊距不敏感，对过辊次数较敏感，过辊6次的NR的门尼粘度接近未均匀化的NR的门尼粘度，NR的优化均匀化方案为辊距 （1.7±0.17） mm，辊温 （25±5） ℃，过辊次数 6；采用优化均匀化方案与采用GB/T 15340—2008方案均匀化的NR的挥发分含量、塑性保持率和硫化特性没有明显差异；采用优化均匀化方案均匀化的NR的门尼粘度[ML（1＋4）100 ℃]明显提高，优化均匀化方案在国内实验室适用，所加工的NR的均匀性和重复性均较好。 |
| 英文摘要: |
| Compared with homogenization process of GB/T 15340—2008，the influence of homogenization process parameters on the physicochemical properties of natural rubber（NR） was investigated by examing the roller temperature，roller distance and number of passes through the rollers in open mill，and the applicability of the optimal homogenization scheme was verified.The results showed that，during the homogenization process，the roller temperature had no dependence on the room temperature，and the room temperature did not need to be strictly controlled.The physicochemical properties of NR were not sensitive to the roller distance，but were more sensitive to the number of passes through the rollers.The Mooney viscosity of NR after 6 passes of rolling was close to that of NR without homogenization.The optimized homogenization scheme for NR was roller spacing （1.7±0.17） mm，roller temperature （25±5） ℃，and 6 passes of rolling．There was no significant difference in the volatile matter content，plasticity retention，and vulcanization characteristics of NR homogenized using the optimized homogenization scheme and the GB/T 15340—2008 scheme.The Mooney viscosity of NR homogenized by the optimized homogenization scheme was significantly improved.The optimized homogenization scheme was applicable in domestic laboratories，and the processed NR had good uniformity and repeatability. |
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