title: Effect of diameter of poly(lactic acid) fiber on the physical properties of poly(ɛ-caprolactone).
abstract: Biodegradable polymer composites based on poly(ɛ-caprolactone) (PCL) and poly(lactic acid) (PLA) fibers with diameters of 18, 26, 180 μm were prepared by melt compounding. The PLA fiber content in the composites was constant at 20% by weight. The effects of fibers with different diameters on the physical properties and enzymatic degradation of PCL were investigated. The morphological analysis indicated good interfacial adhesion between PCL and PLA fiber, which was beneficial to improve the physical properties of PCL. With increasing PLA fiber diameter, the complex viscosity and modulus of PCL were significantly increased, especially at low frequencies, indicating that the hindered effect of the fiber on the mobility of the PCL molecular chains was more obvious when PLA fiber diameter was thicker. However, as for the mechanical properties, the reinforcement was more obvious to PCL with the smaller PLA fiber diameter. This was because increasing efficient load transfer may be appeared due to the larger surface area and better interface bonding force of the fiber with thinner diameters. The enzymatic degradation of PCL was accelerated with the addition of large PLA fiber diameter of 26 and 180 μm, and hardly changed with the small PLA fiber diameter of 18 μm.
authors.affiliation: Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Ju
authors.affiliation: Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China. Electronic address: ljhan@ciac.ac.cn.
authors.forename: Lijing
authors.initials: L
authors.lastname: Han
authors.affiliation: College of Life Science, Northeast Normal University, Changchun 130024, China.
authors.forename: Ziqi
authors.initials: Z
authors.lastname: Guo
authors.affiliation: Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
authors.forename: Junjia
authors.initials: J
authors.lastname: Bian
authors.affiliation: College of Life Science, Northeast Normal University, Changchun 130024, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Li
authors.affiliation: College of Life Science, Northeast Normal University, Changchun 130024, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Chen
authors.affiliation: Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
authors.forename: Lisong
authors.initials: L
authors.lastname: Dong
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D002208:Caproates / Q000737:chemistry*; D019344:Lactic Acid / Q000737:chemistry*; D007783:Lactones / Q000737:chemistry*; D008422:Materials Testing; D011091:Polyesters; D011108:Polymers / Q000737:chemistry*; D012212:Rheology; D013816:Thermodynamics
chemical_list: D001672:Biocompatible Materials; D002208:Caproates; D007783:Lactones; D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide); C121056:caprolactone
keywords: Enzymatic degradation; Mechanical properties; Short-fiber composites