聚羟基烷酸酯的复杂结晶行为和摩擦学性能。

IF 4.5 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-10-14 DOI:10.1016/j.polymer.2025.129207

Pablo-Manuel Martínez-Rubio, María-Dolores Avilés, Francisco-José Carrión-Vilches, Ramón Pamies

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引用次数: 0

摘要

研究了两种聚羟基烷酸酯的结构、热、力学和摩擦学特性。通过核磁共振对聚[3-羟基丁酸盐-co-3-羟基己酸盐]（PHBHHx）和聚[3-羟基丁酸盐-co-4-羟基丁酸盐]（P3HB4HB）的化学组成进行了评价，发现PHBHHx中3-羟基己酸盐的含量为9.74%，P3HB4HB中4-羟基丁酸盐的含量为29.65%。XRD数据表明，PHBHHx的结晶度明显高于P3HB4HB。然而，进行的粘弹性和力学测试显示出复杂的和随时间变化的结晶行为。对这些生物塑料进行了渐进载荷和多次划痕试验，并进行了随后的轮廓测量和扫描电镜研究。PHBHHx的耐载性能较高，其性能和磨损机理与热塑性材料相似。另一方面，P3HB4HB具有较低的抗载荷能力，其磨损机理与弹性体材料相似。

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The complex crystalline behavior and tribological performance of polyhydroxyalkanoates.

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The complex crystalline behavior and tribological performance of polyhydroxyalkanoates.

Structural, thermal, mechanical and tribological characterization of two polyhydroxyalkanoates were studied. The chemical composition of Poly[3-hydroxybutyrate-co-3-hydroxyhexanoate] (PHBHHx) and Poly[3-hydroxybutyrate-co-4-hydroxybutyrate] (P3HB4HB) was evaluated by means of NMR finding that the content of 3-hydroxyhexanoate in PHBHHx was 9.74 % and the content of 4-hydroxybutyrate in P3HB4HB was 29.65 %. XRD data showed that PHBHHx presented much higher crystallinity than P3HB4HB. However, the viscoelastic and mechanical tests conducted showed a complex and time-dependent crystalline behavior. Progressive-load and multi-scratch tests were carried out on these bioplastics with subsequent profilometry and SEM studies. The load resistance of PHBHHx was higher and the performance and wear mechanisms were found to be similar to thermoplastic materials. On the other hand, P3HB4HB presented a lower resistance to load and a wear mechanism similar to elastomeric materials.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.