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聚烯和聚烯化合物的降解在同旋转双螺杆挤出机上
Paul Albrecht1, Matthias Altepeter1, Florian Brüning1
1Kunststofftechnik Paderborn, Paderborn University, 33098 Paderborn, Germany.
Polymers
|June 13, 2025
概括
在双螺杆挤出过程中,聚烯 (PP) 的降解受加工条件的影响. 一个经过修改的数学模型准确地预测了PP降解,但由于特性发生变化,需要对填充化合物进行调整.
科学领域:
- 聚合物科学 聚合物科学
- 材料工程 材料工程 材料工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 聚烯 (PP) 在双螺杆挤出过程中经历了热,机械和氧气暴露的降解.
- 以前的数学模型预测了PP降解,但需要针对不同挤出机尺寸进行调整.
- 填充PP化合物由于变化的热力学和质性质而存在独特的挑战.
研究的目的:
- 修改和验证用于预测双螺丝挤出过程中聚烯降解的数学模型.
- 研究填充PP化合物 (PP/TiO2) 的降解行为.
- 评估模型对填充PP化合物的适用性,并确定差异.
主要方法:
- 在各种操作参数下使用协同旋转的双螺丝挤出机处理整洁的PP和PP/TiO2化合物.
- 通过化流速 (MFR) 和凝透色谱 (GPC) 测量来确定聚合物降解.
- 通过调整用于挤出机尺寸独立性的灵敏度参数来修改先前存在的数学模型.
主要成果:
- 温度升高,螺丝转速和吞吐量降低通常导致PP降解率更高,这与之前的研究一致.
- 修改后的模型准确地预测了不同尺寸的挤出机中整洁的PP的降解.
- 该模型与PP/TiO2化合物的测量降解差异不大,表明降解机制发生了变化.
结论:
- 开发的数学模型有效地预测了聚烯降解,独立于挤出机尺寸.
- 填充剂 (TiO2) 的存在显著改变了PP的热力学和质性质,影响了其降解行为.
- 需要进一步改进模型,以准确捕捉填充聚合物化合物的降解.
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