In order to analyze the effects of chemical treatment of bamboo fiber (BF) on the physical properties of the polypropylene (PP)/ethylene-octene rubber (EOR)/BF composites, BF was treated by NaOH water solution and silane coupling agent. The chemically treated BFs were fabricated at 3 wt% of NaOH concentration and in the range of 1-5 wt% of triethoxyvinylsilane. The chemical structures of the treated BFs were confirmed by FTIR and EDS results. Thermal stability enhancing of the silane treated BF was confirmed by TGA thermograms. PP/EOR/BF composites had the best impact property when BF was treated with both alkali and silane. The interface adhesion properties of the PP/EOR/BF composites were checked by SEM images of the fractured surface after the tension test and contact angles. The complex viscosities of the PP/EOR/BF composites were measured by oscillatory rheometer.

폴리프로필렌(polypropylene, PP)/에틸렌-옥텐 고무(EOR)/대나무 섬유(bamboo fiber, BF) 복합체의 물성에 미치는 BF 화학처리의 영향을 고찰하기 위해, BF에 NaOH 수용액 처리와 실란 커플링제를 처리하였다. NaOH 수용액의 농도는 3 wt%로 고정하였고, 실란 커플링제인 triethoxyvinylsilane의 농도는 1-5 wt%로 변화를 주어 화학처리된 BF를 제조하였다. BF 화학처리에 따른 섬유의 화학구조는 FTIR과 EDS를 통해 확인하였으며, 실란처리 시 BF의 열안정성이 증가함을 TGA를 통해 확인하였다. PP/EOR/BF 복합체의 충격특성은 알카리 처리와 실란처리가 동시에 진행된 BF에 대해서 가장 우수한 결과를 나타내었으며, PP/EOR/BF 복합체의 계면접착특성은 인장시험 후 파단면의 SEM 사진과 접촉각을 통해 확인하였다. 복소점도는 동적유변측정기를 이용하여 측정하였다.

Keywords: polypropylene; bamboo fiber; silane modification; interfacial adhesion