Polymer Bulletin ( IF 3.2 ) Pub Date : 2021-06-06 , DOI: 10.1007/s00289-021-03745-3 Fernanda M. Sousa , Felipe B. Cavalcanti , Vithória A. D. Marinho , Dayanne D. S. Morais , Tatiara G. Almeida , Laura H. Carvalho
The aim of this work is to evaluate the effect of poly-ε-caprolactone addition and concentration on the gas permeability, tensile properties and biodegradation of PBAT/PCL blends prepared by extrusion in a bench scale single-screw extruder. The blends were characterized by scanning electron microscopy (SEM), tensile properties, permeability to oxygen (O2) and carbon dioxide (CO2) gas and biodegradation in soil. Our data indicate that PCL addition to poly(butylene adipate-co-terephthalate) (PBAT) increases its permeability to both O2 and CO2. The tensile properties of the blends are sensitive to PCL concentration and, particularly, their modulus is higher than that of PBAT. SEM images did not show changes in PBAT morphology upon PCL incorporation and content. Biodegradation (bio-disintegration) in soil was shown to increase with both the presence and content of PCL in the blends. Incorporation of up to 25% of PCL to PBAT can be suitable to develop materials with high potential of biodegradation with preserved tensile properties. The higher permeability upon blending with PCL can also be useful in applications such as cooking food coated with polymeric films.
中文翻译:
成分对 PBAT/PCL 共混物薄膜渗透性、机械性能和生物降解的影响
这项工作的目的是评估聚-ε-己内酯的添加和浓度对在台式单螺杆挤出机中挤出制备的 PBAT/PCL 共混物的透气性、拉伸性能和生物降解的影响。共混物通过扫描电子显微镜 (SEM)、拉伸性能、对氧气 (O 2 ) 和二氧化碳 (CO 2 ) 气体的渗透性以及土壤中的生物降解进行表征。我们的数据表明,将 PCL 添加到聚(己二酸丁二醇酯-共对苯二甲酸酯)(PBAT)中会增加其对 O 2和 CO 2 的渗透性. 共混物的拉伸性能对 PCL 浓度敏感,特别是它们的模量高于 PBAT。SEM 图像未显示 PCL 掺入和含量后 PBAT 形态的变化。土壤中的生物降解(生物分解)随着混合物中 PCL 的存在和含量而增加。将高达 25% 的 PCL 掺入 PBAT 可适合开发具有高生物降解潜力并保留拉伸性能的材料。与 PCL 混合后更高的渗透性也可用于应用,例如涂有聚合物薄膜的烹饪食品。