ATR Copolymerization of Styrene with 2-Vinylfuran: An Entry to Functional Styrenic Polymers

作者：Sanchez Sheila Ortega; Marra Francesco; Dibenedetto Angela; Aresta Michele; Grassi Alfonso^*

来源：Macromolecules, 2014, 47(20): 7129-7137.

DOI：10.1021/ma501431u

Samples of styrene-co-(2-vinylfuran) polymers (S-co-2VFs) were obtained in a wide range of composition via ATRP catalyzed by Cu(I)-PMDETA using 1-phenylethyl bromide (1-PEBr) as initiator. Investigation of the copolymerization kinetics allowed evaluating the reactivity ratios r(s) and rVF (rs = kS-S/kS-VF; rVF = kVF-VF/kVF-S; MS = styrene; MVF = 2VF) using the Fineman Ross, Kelen Tudos, extended Kelen Tudos, and Meyer Lowry methods; a quasi-ideal copolymerization behavior was found with reactivity ratios values rs and rVF of 1.21-1.30 and 0.98-1.10, respectively, and reactivity ratio products of .31.6. H-1 NMR investigation of the polymerization solution showed that the reaction of 2VF with the Cu(I)-PMDETA/1-PEBr catalyst causes a reduced efficiency in radical initiation reaction; broadening of the average molecular weight distribution was thus observed at short polymerization time. The T-g values of the S-co-2VFs range from 105 degrees C of PS to 54 degrees C for the S-co-2VF with 2VF mole fraction x2VF of 0.60 (S-co-2VF60); the thermal decomposition of the copolymers starts at about 360 degrees C in air. The S-co-2VFs are stable in solution and solid state at room temperature, but gelation occurs at 100 degrees C in 10% w/w tetrachloroethane solution in air. DielsAlder reaction of S-co-2VF with 1,1%26apos;-(methylenedi-4,1-phenylene)bismaleimide (BMI) readily yields a thermoreversible gel at room temperature.

• 出版日期2014-10-28