%0 Journal Article
%T Synthesis and Characterization of Lactone Functional Macromonomers by End Group Deactivation and Their Use in Miktoarm Star Polymer
%A Kadir Demirelli
%A Feride Bezgin
%J Open Journal of Polymer Chemistry
%P 42-55
%@ 2165-6711
%D 2012
%I Scientific Research Publishing
%R 10.4236/ojpchem.2012.22006
%X Newly designed miktoarm star-shaped copolymers made of poly[(benzyl methacrylate(BMA)-co-(ŠĆ-caprolacton)(CL)] and poly[(BMA-b-MMA-b-BMA)-co-ŠĆ-caprolacton)(CL)] were synthesized by combining ring-opening polymerization (ROP) of ŠĆ-caprolactone (CL) and poly(BMA) five membered lacton fuctionalized prepared via atom transfer radical polymerization (ATRP) of BMA, and ŠĆ-CL and P(BMA-b-MMA-b-BMA) dual functionalized diblock copolymer, in the presence of tin(II) bis(2-ethylhexanoate) (Sn(Oct)2). Although lactone ended poly(benzyl methacrylate) with ŠĆ-caprolactone monomer gave ring open polymerization by Sn(Oct)2, the macromonomer itself did not give any poly- merization The macromonomers, and the miktoarm star-shaped copolymers were analyzed by FT-IR and 1H-NMR spectroscopies and GPC (gel permeation chromatograph), Differential scanning calorimetry (DSC-50) and termo- gravimetric analysis (TGA-50). These copolymers exhibited the expected structure. The crystallization of star-shaped copolymers was studied by DSC. The results show that when the content of the BMA block increased, the Tm of the star-shaped block copolymer increased.
%K Miktoarm Star Polymer
%K Lacton
%K Ring Open Polymerization
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=19530