多重再加工对聚基酸和聚烯的性能的影响
Priyanka Main1,2,3, Sandra Petersmann4, Nadine Wild4
1Polymer Processing, Montanuniversitaet Leoben, Otto-Gloeckel-Straße 2, 8700 Leoben, Austria.
Polymers
|October 28, 2023
概括
聚基酸盐 (PHBs) 通过五个机械回收循环表现出良好的稳定性,保持拉伸强度和热稳定性等关键性质. 对添加剂的进一步研究可以提高它们的循环性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 可持续材料 可持续材料
背景情况:
- 生物基塑料提供了可持续的替代品,但它们的生命周期结束选择,特别是机械回收利用,需要进一步研究.
- 聚基酸盐 (PHBs) 是生物基的,具有有前途性质的可生物降解聚合物,使其成为更广泛循环的候选者.
研究的目的:
- 通过多个挤出周期 (E1-E5) 评估PHB的机械可回收性.
- 将再加工的PHB与原始PHB的行为进行比较,并将聚烯 (PP) 作为参考材料.
主要方法:
- 多面性表征包括差异扫描热度计 (DSC),热重力测量分析 (TGA),凝透色谱 (GPC) 和融质流率 (MFR).
- 进行了机械测试 (拉伸强度,破裂时的应变,冲击强度),扫描电子显微镜 (SEM),富里埃变换红外光谱 (FTIR) 和风湿学研究.
主要成果:
- PHB保持了稳定的点和分解温度,结晶度增加抵消了分子重量下降.
- 拉力强度在整个循环中保持一致,而破裂时的应变和冲击强度在第一次挤出后受到影响.
- 对于PHB,观察到MFR和初始粘度变化的显著下降,与PP的稳定类风湿行为形成鲜明对比.
结论:
- PHB显示了机械回收的巨大潜力,在多个循环过程中保留了必不可少的特性.
- 在PHB和PP之间质行为 (MFR,粘度) 的差异突出了未来优化领域.
- 未来的工作应该探索新材料和其他添加剂的添加,以进一步提高PHB的可回收性和性能.
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