无化学品的生物源聚 ((乙烯-苏酸盐-酸盐) 的反应性化加工,以提高机械性能和可回收性
Michele Gammino1, Claudio Gioia2, Andrea Maio1
1Department of Engineering, University of Palermo, Viale delle Scienze, Ed. 6, 90128 Palermo, Italy.
概括
这项研究引入了一种绿色反应性处理方法,用于聚乙烯酸-co-butylene酸盐 (PBSA),以提高其性能和可回收性,而无需化学添加剂. 优化的条件提高了机械强度,并使可生物降解聚合物的可持续回收成为可能.
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
- 可持续化学 可持续化学
背景情况:
- 聚乙烯 (PBSA) 是一种可生物降解的聚,具有一次性应用的潜力.
- 在加工过程中PBSA的热力学敏感性限制了其机械性能和可回收性.
- 传统的反应加工 (RP) 方法通常依赖于不可持续的化学添加剂.
研究的目的:
- 为PBSA开发一种没有化学添加剂的绿色反应性化加工 (RP) 方法.
- 通过受控的降解和分支来提高PBSA的气质和机械性能.
- 为了提高PBSA的机械可回收性.
主要方法:
- 通过使用内部批量混合器,研究了PBSA在化复合过程中的直线质行为.
- 研究了加工参数 (温度,螺丝速度,停留时间) 对PBSA降解和结构变化的影响.
- 确定了促进分支/重组反应的最佳加工条件.
主要成果:
- 特殊条件 (12分钟,200°C,60rpm) 促进了PBSA中的长链分支.
- 增强的PBSA在弹性模量上呈现了23%的增加,收益强度增加了50%,拉伸强度增加了80%.
- 绿色RP战略改善了PBSA的机械回收潜力.
结论:
- 在RP期间控制的热力学降解可以显著提高PBSA的性能.
- 这种无添加剂的方法为改善可生物降解的聚合物提供了可持续的途径.
- 开发的方法将PBSA定位为传统热塑性塑料 (如LDPE) 的可行替代品.
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