通过低酸盐进行高粘度PA6/66聚胺固态聚合的高效催化:动力学,过程优化和工业应用
Feng Jiang1,2, Chunxiao Yu1,2, Zhiyu Hu2
1State Key Laboratory of Advanced Fiber Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.
Polymers
|February 13, 2026
概括
低酸盐有效地催化了高粘度共聚胺6/66 (PA6/66) 的固态聚合 (SSP). 这种方法确保了稳定的粘度增加率和在大型工业生产中统一的产品质量.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 高粘度聚胺6/66 (PA6/66) 的工业制备面临诸如长反应时间,高能耗和粘度不一致等挑战.
- 固态聚合 (SSP) 是聚合物修饰的关键过程,但优化它用于高粘度材料需要高效的催化系统.
研究的目的:
- 调查低酸盐作为PA6/66.6.的固态聚合 (SSP) 的催化剂的使用.
- 为了优化催化剂提取过程,以管理催化剂损失和控制可提取内容.
- 为大规模,连续生产高粘度PA6/66.6.6的可靠工艺的建立.
主要方法:
- 在PA6/66共聚合系统中引入低酸盐.
- 在SSP期间系统地调查催化剂对粘度增加率和相对粘度的影响.
- 提取过程的优化,以控制催化剂度和可提取物.
- 在4500/年连续聚合线上实施催化SSP工艺.
主要成果:
- PA6/66的相对粘度随着SSP时间线性增加,在160°C时具有0.14h-1的稳定表面粘度增加率.
- 最佳催化剂度 (含量) 确定为150°C时25ppm,160°C时30ppm,以防止粘度过度增加.
- 优化的提取过程确保了催化剂度保持在控制水平以上,同时满足可提取内容的加工要求.
- 在工业规模上,成功地稳定制备了具有均粘度的高粘度PA6/66芯片.
结论:
- 低酸是一种有效的催化剂,可提高PA6/66.6的SSP速率.
- 控制的添加和优化的低酸盐提取使高粘度PA6/66.6的高效大规模生产成为可能.
- 这项研究为制造高质量,高粘度PA6/66树脂提供了强大的理论和工艺框架.
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