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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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生物聚/化合物:制造,表征和生物降解

Carina Frank1,2, Anita Emmerstorfer-Augustin1,3, Thomas Rath2

  • 1Acib-GmbH, Krenngasse 32, A-8010 Graz, Austria.

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概括

天然 (NR) 有效地软化易碎的聚3-基酸-co-3-基酸 (PHBV) 无需化石塑化剂. 这些新的NR-PHBV混合物具有耐用性,弹性和生物降解性,提供可持续的材料解决方案.

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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
  • 生物技术是生物技术.

背景情况:

  • 生物基和可生物降解聚合物 (BBD),如聚3-基酸-co-3-基酸 (PHBV),是化石塑料的环保替代品.
  • PHBV的高晶度和脆性限制了它的应用.
  • 需要有效的非化石塑化剂来改善PHBV的机械性能.

研究的目的:

  • 调查天然 (NR) 作为PHBV的冲击修饰剂的适用性.
  • 使用NR.开发更软,更耐用的基于PHBV的材料.
  • 为了评估产生的NR-PHBV混合物的生物降解性.

主要方法:

  • 机械混合 (卷混合机和/或内部混合机) 的NR和PHBV在不同的比例.
  • 用于样品制备的激进C-C交联.
  • 使用尺寸排除色谱,FTIR,SEM,热分析,XRD和机械测试进行表征.
  • 使用脱聚合酶,pH转移试验和SEM分析进行生物降解性评估.

主要成果:

  • NR-PHBV混合物显示出出色的弹性和耐用性.
  • SEM分析证实了NR在PHBV矩阵中的成功整合.
  • 通过pH转移测定和表面形态变化证实了PHBV成分的酶降解.
  • 成功证明了NR-PHBV混合物的生物降解性.

结论:

  • 天然 (NR) 是一个非常适合和可持续的替代品,以化石为基础的塑化剂PHBV.
  • NR-PHBV混合物表现出优越的材料特性,包括增强的弹性和耐久性.
  • 这些可生物降解的NR-PHBV混合物为各种应用提供了有前途的材料,促进了环境可持续性.