Novel branched poly(ɛ‐caprolactone) as a nonmigrating plasticizer in flexible PVC : Synthesis and characterization

作者：Yangze Huang, Erlei Yu, Yanke Li, Zhong Wei · 发表于：Journal of Applied Polymer Science · 年份：2018 · DOI：10.1002/app.46542 · 被引用次数：40 · 研究领域：Polymer Science and PVC、biodegradable polymer synthesis and properties、Advanced Polymer Synthesis and Characterization

ABSTRACT A series of hyperbranched poly(ɛ‐caprolactone) (HPCLs, denoted as D X ) with different molecular weights were synthesized by the copolymerization of GPCL (PCL initiated by glycidol) and succinic anhydride. The chemical structure of D X was characterized by 1 H‐NMR gel permeation chromatography and inherent viscosity, and D X was used as the plasticizer for poly(vinyl chloride) (PVC) compared to traditional plasticizer di‐(ethylhexyl) phthalate (DEHP). The thermal properties, morphology, mechanical properties, and migration stabilities of PVC films were explored with differential scanning calorimetry, thermogravimetric analysis, scanning electron microscope, tensile, and migration tests. PVC/D 1 exhibited the best plasticization efficiency up to 107%, with enhanced tensile strength (18.5 MPa) and ultimate elongation (416%) compared to PVC/DEHP (11.5 MPa and 375%, respectively). PVC/D 1 exhibited remarkably high plasticization efficiency as compared to PVC/DEHP at a plasticizer concentration of PVC below 40 wt %. Moreover, the migration test for PVC/D X films exhibited minimal plasticizers migration even at very harsh conditions. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46542.