Effect of Oligomer Segregation on the Aggregation State and Strength at the Polystyrene/Substrate Interface

Manabu Inutsuka, Hirohmi Watanabe, Masaru Aoyagi, Norifumi L. Yamada, Chisa Tanaka, Takayuki Ikehara, Daisuke Kawaguchi, Satoru Yamamoto, Keiji Tanaka

Research output: Contribution to journalArticlepeer-review

Abstract

The interfacial strength of polystyrene (PS) with and without PS oligomers in contact with a glass substrate was examined to determine the relationship between the interfacial aggregation state and adhesion. The shear bond strength and adsorbed layer thickness of neat PS exhibited a similar dependence on the thermal annealing time: they increased to constant values within almost the same time. This implies that the adhesion of the polymer is closely related to the formation of an adsorbed layer at the adhesion interface. Nevertheless, in the case of PS with a small amount of oligomer, the shear bond strength decreased, while the adsorbed layer thickness was almost the same as that of neat PS. Based on the results of interfacial analyses, we propose that the interfacial segregation of the oligomer reduced the entanglement between the interfacial free chains in the adsorbed layer and the bulk chains.

Original languageEnglish
Pages (from-to)504-509
Number of pages6
JournalACS Macro Letters
Volume11
Issue number4
DOIs
Publication statusPublished - Apr 19 2022

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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