Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Influence of Surface Free Energy on Mechanical Interfacial Properties of Resol-type Phenolic Resin/Poly(vinyl alcohol) Blend System

레졸형 페놀수지/폴리비닐알콜 블랜드계의 표면 자유에너지 변화가 기계적 계면특성에 미치는 영향

  • 박수진 (한국화학연구원 화학소재연구부) ;
  • 정우영 (한국화학연구원 화학소재연구부) ;
  • 박병기 (전북대학교 섬유공학과)
  • Published : 2001.10.01

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Abstract

In this work, surface free energies and mechanical properties of resol-type phenolic resin (RPR)/poly(vinyl alcohol) (PVA) blends were studied. The intermolecular interaction between RPR and PVA was confirmed by Fourier transform infrared (FT-IR) spectroscopy. Contact angle measurements were performed using a three-liquid acid-base method to determine the surface free energies of RPR/PVA blends. Interlaminar shear strength (ILSS) and critical stress intensity factor ( $K_{IC}$) tests were carried out to exploit the effect of surface free energies on the mechanical properties of blends under study. The morphologies of he fracture surface of RPR/PVA blends were investigated by scanning electron microscopy (SEM). FT-IR results showed the formation of hydrogen bonds in RPR/PVA blends. Surface free energy was a maximum value when PVA content was 5 vl% in RPR. Both nonpolar and polar components contributed to an increase in the surface free energy. ILSS and $K_{IC}$ increased with the addition of PVA, and then decreased when PVA content was higher than 5 vol%. Morphological results showed that the fracture surface area increased with the increase in PVA content, which was in good agreement with the mechanical properties of RPR/PVA blends.s.

Keywords

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