Synthesis and Characterization of Lactone Functional Macromonomers by End Group Deactivation and Their Use in Miktoarm Star Polymer

Abstract

Newly designed miktoarm star-shaped copolymers made of poly[(benzyl methacrylate(BMA)-co-(-caprolacton)(CL)] and poly[(BMA-b-MMA-b-BMA)-co--caprolacton)(CL)] were synthesized by combining ring-opening polymerization (ROP) of -caprolactone (CL) and poly(BMA) five membered lacton fuctionalized prepared via atom transfer radical polymerization (ATRP) of BMA, and -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 -caprolactone monomer gave ring open polymerization by Sn(Oct) 2 , the macromonomer itself did not give any polymerization The macromonomers, and the miktoarm star-shaped copolymers were analyzed by FT-IR and 1 H-NMR spectroscopies and GPC (gel permeation chromatograph), Differential scanning calorimetry (DSC-50) and termogravimetric 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 T m of the star-shaped block copolymer increased.

Synthesis, characterization, and dielectric properties of polymers functionalized with coumarone and diethanolamine

“…Ethyl alcohol was obtained from Fluka. 4‐Chloromethyl‐7‐hydroxycoumarone was obtained from our previous study …”

“…The synthesis of 4‐chloromethyl‐7‐methacryloyloxy coumarone (ClMMAOC) monomer is carried out in accordance with the standard method and our previous study . The monomer was synthesized by the reaction of 4‐chloromethyl‐7‐hydroxycoumarone and methacryloyl chloride at 0–5°C by using TEA.…”

Synthesis and characterisation of a photoresponsive four-armed graft copolymer prepared from coumarin and methyl methacrylate

“…The resulting product, 7-hydroxyl-4-chloro-methyl coumarone, was recovered by filtration and then cleansed with the use of 9:1 n-hexane/ethyl acetate as an eluent. 1 H-NMR (␦, ppm): 4.89 (2H, CI-CH 2 -), 6.40 (1H, olefinic proton on coumarone), 6.79 and 6.91 (protons on 5 and 6 carbons in aromatic ring), 7.71 (1H, between two rings coumarone unities) (Demirelli and Bezgin, 2012).…”

“…Carbon-13 ( 13 C)-NMR (␦, ppm): 41.3 (CI-CH 2 -), 126.2, 112.9, 111.6, 110.1, 102.8 (carbons with hydrogen of coumarone) (Demirelli and Bezgin, 2012).…”

Statistical Copolymers Of Benzyl Methacrylate And Diethylaminoethyl Methacrylate: Monomer Reactivity Ratios And Thermal Properties

“…Block copolymers containing PDEAEMA blocks are widely used in the literature as pH -and temperature responsive materials in aqueous solutions, as a consequence of the increase in hydrophobicity upon deprotonation [19,20]. On the other hand benzyl methacrylate (BzMA) is a very interesting monomer, which can be used as a substitute in the methacrylate family of monomers of the very commonly used styrene (St) in copolymerization studies [21]. PBzMA is also hydrophobic and amorphous as PSt but with a much lower glass transition, Tg, value [(Tg) PBzMA =54°C instead of (Tg) PSt =100°C] [22], leading to the formation of more flexible and easily processable copolymeric structures.…”