One of the defect for polymers based film is the low thermal conductivity which restricts their application. In this study, an effective strategy in improving the thermal conductivity of poly(butylene succinate) phosphorus‐containing ionomer [phosphorus‐containing ionic group (PCIG) content was 1wt%, denoted as PBSI1‐K] by compression molding was proposed. PBSI1‐K films with anisotropic thermal transport were fabricated by thermal compression molding with different compression molding pressure (2000, 2500, 3000, and 3500 psi). The relationships between the compression molding pressure and properties, including thermal conductivity, crystallization behavior and chain orientation degree of PBSI1‐K films were investigated. Strikingly, PBSI1‐K film fabricated at 2500 psi pressure, denoted as PBSI1‐K‐2500, achieved 5‐fold increase in in‐plane thermal conductivity when PBS was used as the contrast. The impressive improved thermal conductivity (542 mW m⁻¹ K⁻¹) in horizontal direction are ascribed to the fact that PBSI1‐K‐2500 obtained the large spherulite diameter (517 um) and high chain orientation degree (1.90). Furthermore, we introduced graphene into PBSI1‐K and the thermal conductivity of GNS/PBSI1‐K composites have also been discussed. We hence showcase compression molding here as a facile strategy to prepare ionomer film with improved thermal conductivity. The prepared PBSI1‐K‐2500 can serve as biodegradable films to replace petroleum‐based plastic materials and remedy the pollution of “microplastics.”

中文翻译：

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通过压缩成型提高各向异性的聚丁二酸丁二醇酯含磷离聚物薄膜导热性的简便策略

聚合物基薄膜的缺陷之一是导热率低，这限制了它们的应用。在这项研究中，提出了一种通过压缩成型来改善聚丁二酸丁二醇酯含磷离聚物[含磷离子基团（PCIG）含量为1wt％，称为PBSI1-K]的导热性的有效策略。具有各向异性热传递的PBSI1-K膜是通过在不同的压模压力（2000、2500、3000和3500 psi）下进行热压模制而成的。研究了压塑压力与PBSI1-K薄膜的性能之间的关系，包括导热性，结晶行为和链取向度。令人惊讶的是，在2500 psi压力下制作的PBSI1-K薄膜称为PBSI1-K-2500，当使用PBS作为对比时，面内导热率提高了5倍。令人印象深刻的改进的导热率（542 mW m^-1 K ^-1）在水平方向上归因于PBSI1-K-2500获得的大球晶直径（517 um）和高链取向度（1.90）。此外，我们将石墨烯引入PBSI1-K中，还讨论了GNS / PBSI1-K复合材料的导热性。因此，我们在这里展示压缩模塑法是一种制备具有改善的导热性的离聚物薄膜的简便策略。制备的PBSI1-K-2500可以用作可生物降解的薄膜，以代替石油基塑料材料并纠正“微塑料”的污染。