Article
  • Variation of UV Resistance and Film Property Based on Crosslinking Types of FEVE Layer Coated over PVDF Layer
  • Kim JO, Sim S, Cho EB
  • 폴리(비닐리덴 플루오라이드)(PVDF) 막 위에 코팅되는 플루오로에틸렌 비닐 에테르(FEVE) 막의 가교형태에 따른 내자외선성 및 물성 변화 연구
  • 김진오, 심소라, 조은범
Abstract
This study describes the effect of crosslinking types on chemical and physical properties and UV resistance of fluoroethylene vinyl ether (FEVE) layer over poly(vinylidene fluoride) (PVDF) in coil-coating. Hexamethoxymethylmelamine (HMMM) of melamine type and hexamethylene diisocyanate (HDI) of isocyanate type were used respectively as crosslinkers of high gloss and transparent FEVE layer on the PVDF coating layer. The evaluation of physical property and UV (UV-B) resistance was processed within ASTM standards. Urethane-reaction group using HDI showed relatively much better stability against UV (UV-B) than melamine reaction group of HMMM, while some physical and chemical resistances were found to be weaker. Also, in spite of the same melamine reaction group, the UV resistance was varied according to the ratio of HMMM cross-linker. From this study, it is expected to enhance weatherability as well as minimize the film deterioration from UV through optimizing crosslinking reaction in FEVE/PVDF double layer coating as a building exterior application.

본 연구에서는 코일 코팅용 폴리(비닐리덴 플루오라이드)(poly(vinylidene fluoride), PVDF) 막 위에 코팅된 플루오로 에틸렌 비닐 에테르(fluoroethylene vinyl ether; FEVE) 코팅 층의 가교형태에 따른 화학적, 물리적 특성 및 내자외선성을 고찰하였다. 고광택 투명 FEVE 층의 가교제로서 멜라민 류의 hexamethoxymethylmelamine(HMMM)과 이소시아네이트 류의 hexamethylene diisocyanate(HDI)를 각각 사용하여 가교 반응을 적용하였다. 코팅 막의 기계적 물성 및 내자외선성(UV-B) 시험은 미국재료시험협회 규격(ASTM)에 의거하여 진행되었다. 이소시아네이트를 사용한 우레탄 반응군이 HMMM의 멜라민 가교 반응군 대비 기계적, 화학적 강도는 일부 상대적 열위이나 내자외선성(UV-B)에서는 우수한 결과를 보였다. 또한 같은 HMMM의 멜라민 가교 반응이더라도 가교제 함량에 따라 내자외선성이 변화되는 모습이 관찰되었다. 본 연구를 통해 PVDF 막 위의 FEVE 코팅에 적절한 가교 반응을 선택 설계함으로써 건축 외장재 용도로 자외선에 의한 코팅 막 열화를 최소화하면서 우수한 내후성을 확보할 수 있게 되었다.

Keywords: polyvinylidene fluoride (PVDF); fluoroethylene vinyl ether (FEVE); UV resistance; crosslinking type

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2017; 41(2): 301-308

    Published online Mar 25, 2017

  • 10.7317/pk.2017.41.2.301
  • Received on Oct 3, 2016
  • Accepted on Nov 15, 2016