NDLI: Water-induced surface structure of poly(dimethylsiloxane)-containing block copolymers

Content Provider	Springer Nature Link
Author	Jo, Nam Ju Chun, Jae Hwan Lim, Kwon Taek Jang, Ei Sup Lee, Won Ki
Copyright Year	2013
Abstract	Two triblock copolymers, polyester-b-poly(dimethylsiloxane) (PDMS)-b-polyester, were synthesized by the ring-opening polymerization with both hydrophobic and water-repellent hydroxyl-terminated PDMS and hydrolytically degradable ester monomers. The T $_{ g }$s of the polyester blocks were controlled by ɛ-caprolactone/lactide mixture or lactide only. The surface composition of the triblock copolymers was measured by angle-dependent electron: X-ray photoelectron spectroscopy. The results showed that the PDMS block with a low surface energy in the copolymers was quite segregated in the surface region; the copolymer films showed significantly higher mole fractions of PDMS (0.78–0.86) at a low takeoff angle compared with their bulk mole fractions (0.015–0.02). When the films were exposed to water at 20 °C for 70 min, the mole fractions of surface PDMS were decreased to 0.3–0.5 because of the water-repellent hydrophobicity and the chain mobility of both blocks.
Starting Page	821
Ending Page	825
Page Count	5
File Format	PDF
ISSN	15985032
Journal	Macromolecular Research
Volume Number	21
Issue Number	7
e-ISSN	20927673
Language	English
Publisher	The Polymer Society of Korea
Publisher Date	2013-02-09
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	triblock copolymers poly(dimethylsiloxane) (PDMS) surface energy water chain mobility Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Physical Chemistry Characterization and Evaluation of Materials Nanochemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Materials Chemistry Chemical Engineering Polymers and Plastics

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