Syntheses and Specific Interactions of Poly(ε-caprolactone)-block-poly(vinyl phenol) Copolymers Obtained via a Combination of Ring-Opening and Atom-Transfer Radical Polymerizations

✍ Scribed by Shiao-Wei Kuo; Chih-Feng Huang; Chu-Hua Lu; Ho-May Lin; Kwang-Un Jeong; Feng-Chih Chang

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 333 KB
• Volume: 207
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200600250

✦ Synopsis

Abstract

Summary: A series of PCL‐b‐PVPh diblock copolymers were prepared through combinations of ring‐opening and atom‐transfer radical polymerizations of ε‐caprolactone and 4‐acetoxystyrene, and subsequent selective hydrolysis of the acetyl protective group. This PCL‐b‐PVPh diblock copolymer shows a single glass transition temperature over the entire composition range, indicating that this copolymer is able to form a miscible amorphous phase due to the formation of intermolecular hydrogen bonding between the hydroxyl of PVPh and the carbonyl of PCL. In addition, DSC analyses also indicated that the PCL‐b‐PVPh diblock copolymers have higher glass transition temperatures than their corresponding PCL/PVPh blends. FT‐IR was used to study the hydrogen‐bonding interaction between the PVPh hydroxyl group and the PCL carbonyl group at various compositions.

FT‐IR spectra in the 1 680–1 780 cm^−1^ for PCL‐b‐PVPh copolymers with various PVPh contents.

magnified imageFT‐IR spectra in the 1 680–1 780 cm^−1^ for PCL‐b‐PVPh copolymers with various PVPh contents.