Kim, Hyun-Ji Lee, Yun Jae Hwang, Seung Sang Choi, Dong Hoon Yang, Hoichang Baek, Kyung-Youl 2024-01-20T16:03:53Z 2024-01-20T16:03:53Z 2021-09-05 2011-10-01 0887-624X https://pubs.kist.re.kr/handle/201004/129903 Regioregular poly(3-hexyl thiophene) (rr-P3HT)-based star polymers were synthesized by a crosslinking reaction of the linear rr-P3HT macroinitiator and ethylene glycol dimethacrylate (EGDMA) crosslinker through Ru-based atom transfer radical polymerization (ATRP), where the rr-P3HT macroinitiator was prepared by Grignard metathesis method (GRIM) followed by end functionalization of the ATRP initiator with chlorophenylacetate (CPA) to the rr-P3HT. Relatively high molecular weight of the star polymers were obtained (M-p = 8,988,000 g/mol), which consisted of large numbers of the rr-P3HT arm chains radiating from the EGDMA-based microgel core. The yield of the star polymers were strongly affected by the added amount of the EGDMA crosslinker. The crystalline structure of the rr-P3HT by intermolecular pi-pi stacking interaction gradually decreased as the star polymer formed, which was confirmed by differential scanning calorimeter (DSC), atomic force microscopy (AFM), and electro-optical analyses. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 4221-4226, 2011 English WILEY LIVING RADICAL POLYMERIZATION SHAPED POLYMERS Synthesis of Multiarmed Poly(3-hexyl thiophene) Star Polymer with Microgel Core by GRIM and ATRP Methods Article 10.1002/pola.24864 1 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.49, no.19, pp.4221 - 4226 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 49 19 4221 4226 scie scopus 000295236300013 2-s2.0-80052247757 Polymer Science Polymer Science Article LIVING RADICAL POLYMERIZATION SHAPED POLYMERS atom transfer radical polymerization (ATRP) conducting polymers crosslinking microgels star polymers