加速储存诱导了天然的结构演变:对两个恒定粘度处理方法的比较研究
Danhua Yun1, Wenfeng Peng2, Hongtu Lin2
1School of Materials Science and Engineering, Hainan University, Haikou 570228, China.
Polymers
|April 12, 2025
概括
在比较天然制备方法时,干混合在储存期间提供更好的常温性 (CV) 性能,而乳混合更好地保持分子分支. 这两种方法都保持了分子结构.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 技术 技术 技术
背景情况:
- 恒定粘度 (CV) 天然对于一致的加工至关重要.
- 了解不同CV制备方法的存储稳定性至关重要.
- 目前的主流方法包括干混合和乳混合.
研究的目的:
- 通过加快储存的干和乳混合方法制备的CV天然的结构变化进行比较.
- 评估这些制备方法对中度结构和微观结构的影响.
- 评估关键物理和化学性质的长期稳定性.
主要方法:
- 使用干混合和乳混合技术制备CV天然.
- 加速储存测试48小时.
- 对中层结构和微观结构变化的分析.
- 测量穆尼粘度 (ML) 和华莱士可塑性 (P0).
- 评估分子重量,分子重量分布和分子链形状.
主要成果:
- 这两种方法在储存后都保持了一致的宏凝含量.
- 在这两种方法中都观察到微凝 (>1μ) 含量略有增加.
- 在这两种方法中,分子重量,分布和链形状都保持稳定.
- 干混合在保持Mooney粘度和Wallace可塑性方面表现出卓越的性能.
- 乳混合证明了在保持每个链的分支数量方面具有优势.
结论:
- 干燥混合在储存期间保持天然的稳定粘度特性方面是优越的.
- 乳混合在保存天然的分子分支结构方面表现出色.
- 这两种方法都在关键的结构参数上提供稳定性,例如分子量和宏凝含量.
- 准备方法的选择会影响储存期间的特定性能特征.
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