DataVXJournal of Adhesion Science and TechnologyPaper
journal article·2011-01-01

Effects of Polystyrene Block Content on Morphology and Adhesion Property of Polystyrene Block Copolymer

Yoshinobu Nakamura, Manabu Adachi, Yosuke Kato, Syuji Fujii, Mariko Sasaki, Yoshiaki Urahama, Shinichi Sakurai

Journal of Adhesion Science and Technology· Volume 25· Issue 8
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Source abstract

Abstract

Effects of polystyrene block content on adhesion property and phase structure of polystyrene block copolymers were investigated. Polystyrene-block-polyisoprene-block-polystyrene triblock and polystyrene-block-polyisoprene diblock copolymers with different polystyrene block contents in the range from 13 to 35 wt% were used. In the case of the low polystyrene block content (below 16 wt%), a sea-island structure was observed: near-spherical polystyrene domains having a mean diameter of about 20 nm were dispersed in polyisoprene matrix. The phase structure changed from a sea-island structure to a cylindrical structure with an increase of polystyrene block content (over 18 wt%). Peel strength decreased with an increase of polystyrene block content and the pure triblock copolymers had lower peel strength than their blends with the diblock copolymers. Pulse nuclear magnetic resonance studies indicated that molecular mobility of polyisoprene phase decreased with an increase of polystyrene block content, and the molecular mobility was lower in the pure triblock than in the blend. Thus, the peel strength was found to be related to molecular mobility. The adhesion strength of the block copolymer depended on the molecular mobility: high molecular mobility can promote interfacial adhesion.
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Research context

OpenAlex topics: Block Copolymer Self-Assembly · Polymer crystallization and properties · Advanced Polymer Synthesis and Characterization

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

a Department of Applied Chemistry and Nanomaterials Microdevices Research Center, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan, Department of Applied Chemistry, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan;, Email: nakamura@chem.oit.ac.jp

b Department of Applied Chemistry and Nanomaterials Microdevices Research Center, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan

c Department of Applied Chemistry and Nanomaterials Microdevices Research Center, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan

d Department of Applied Chemistry and Nanomaterials Microdevices Research Center, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan

e Nitto Analytical Techno-Center Co. Ltd., 1-8-5 Hatara, Fukaya, Saitama 366-8521, Japan

f Japan Adhesive Tape Manufacturers Association, 1-9-12 Uchikanda, Chiyoda-ku, Tokyo 101-0047, Japan

g Department of Macromolecular Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan

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