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Synthesis and characterization of poly(L-lactide)-block-poly(ε-caprolactone)-grafted titanium dioxide nanoparticles via ring-opening in situ grafting polymerization
, Article Polymer Composites ; Volume 42, Issue 8 , 2021 , Pages 3722-3731 ; 02728397 (ISSN) ; Sharif, F ; Ramezani Saadat Abadi, A ; Sharif University of Technology
John Wiley and Sons Inc
2021
Abstract
The synthesis of nanocomposites via in situ grafting polymerization due to its ability to produce polymeric materials with promising microscopic and macroscopic characteristics is becoming very attractive. In this paper, different poly(L-Lactide)-block-poly(ε-caprolactone) (PLLA-b-PCL) copolymers were in situ synthesized in the presence of modified titanium dioxide (TiO2) nanoparticles (mTNP) as the initiator and stannous octoate as the catalyst. The surface of TiO2 was modified by grafting aminopropyl trimethoxy silane to improve initiator efficiency. Copolymers with 90/10, 70/30, and 50/50 mass ratio of L-lactide/ ε-caprolactone and 5 wt% of mTNP (proportional to ε-caprolactone) were...