Wood-polyethylene composites using ethylene-vinyl alcohol copolymer as adhesion promoter.
Saw dust-reinforced linear low density polyethylene (LLDPE) (1:1) composites were prepared by using ethylene-vinyl alcohol copolymer (EVAL) as adhesion promoter to improve mechanical strength. To evaluate the optimum vinylalcohol (VA) content in EVAL, various EVAL samples containing different contents of VA were used. The tensile properties of saw dust-LLDPE composites were improved by using EVAL as adhesion promoter in place of ethylene-vinyl acetate copolymer (EVAc). The saw dust-LLDPE composites prepared with EVAL containing 15 mol% VA showed the maximum yield stress and modulus. The tensile stress increased with addition of EVAL up to 3wt% on the wood filler, and then leveled off in the range of 3-10 wt%. However, the elongation was decreased with increasing VA content. Hydrogen bonding interaction between saw dust and EVAL was detected by FT-IR spectra. When EVAL consisting with 15 mol% VA was used, good adhesion between saw dust and LLDPE matrix was confirmed by SEM fractography.
Kim
Jae-Pil
JP
Korea Photonics Technology Institute, Bonchon-dong, Buk-gu, Gwangju 500-210, Republic of Korea.
Yoon
Tae-Ho
TH
Mun
Sung-Phil
SP
Rhee
Jong-Moon
JM
Lee
Jae-Suk
JS
D000268:Adhesiveness; D000269:Adhesives / Q000737:chemistry*; D006868:Hydrolysis; D008422:Materials Testing; D019563:Mechanics; D008855:Microscopy, Electron, Scanning; D020959:Polyethylene / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014934:Wood
D000269:Adhesives; D011108:Polymers; D011145:Polyvinyls; C020320:ethylene-vinyl alcohol copolymer; D020959:Polyethylene