A new thermoset has been prepared from a bismaleimidic terminated polycaprolactone polyester and a tris-furan compound acting as a crosslinker via the Diels-Alder reaction between the furan and maleimide functionalities. Owing to the reversibility of the Diels-Alder chemistry and the increased mobility of the crosslinked polyester chains, this material had the ability to mend scratches under mild temperature conditions. The synthesized precursors and resulting crosslinked material were characterized using 1H NMR, FT-IR, GPC, TGA and DSC methods. The scratch mendability of the material was investigated using optical microscopy. | SCIENCE & TECHNOLOGY DEVELOPMENT, , - 2016 Synthesis of a polycaprolactone-based material with shape-memory and mendability Tri Minh Phan Thuy Thu Truong Thanh Dac Nguyen Polymer Research Center & Faculty of Materials Technology, Ho Chi Minh City University of Technology, VNU-HCM. (Manuscript Received on August 28th, 2015, Manuscript Revised July 06th, 2015) ABSTRACT A new thermoset has been prepared from a bismaleimidic terminated polycaprolactone mend scratches under mild temperature conditions. The synthesized precursors and polyester and a tris-furan compound acting as a resulting crosslinked material were 1 crosslinker via the Diels-Alder reaction between the furan and maleimide functionalities. Owing characterized using H NMR, FT-IR, GPC, TGA and DSC methods. The scratch mendability of the to the reversibility of the Diels-Alder chemistry and the increased mobility of the crosslinked material was microscopy. investigated using optical polyester chains, this material had the ability to Keywords: Scratch mendability, maleimide, furan, polycaprolactone polyester 1. INTRODUCTION Nowadays, the application of polymeric can even develop further into damage which considerably shortens material lifetime. coatings not only gives better processability but also provides a good protection due to their In recent decades, various self-mending approaches have been developed rapidly, barrier properties [1]. Nevertheless, these materials are easily damaged when continuously including microencapsulation, microvascular networks, supramolecular self-assembly and exposed to the external environment, such as reversible mechanical attack, chemical abrasion, UV radiation, or a combination of these factors. approaches, intrinsic remendable polymeric systems, which contain reversible covalent Small defects are easily created in the coatings, but difficult or impossible to be detected and bonds, is a particularly attractive one. .
