Effect of Photostablizers on Surface Color and Mechanical Property of Wood-flour/HDPE Composites after Weathering  

作　　者：薛平 贾明印 

机构地区：[1]Institute of Plastics Machinery and Engineering, Beijing University of Chemical Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第4期621-627,共7页武汉理工大学学报（材料科学英文版）

摘　　要：The effects of photostabilizers of ultraviolet absorbers （UVA）, hindered amine light stabilizer （HALS） and pigment on surface color change and mechanical properties of weathered wood-flour/ polyethylene （HDPE） composites were investigated. After being added UVA with high UV absorbance, the WPC exhibites better ability to resist color fading and mechanical property loss. High molecular weight HALS is found to be the most effective in controlling long term fading and yellowing changes. Pigments cover the composites for remaining the original color after weathering regardless of less contribution to mechanical property. Addition of photostabilizer and pigment together show great synergism in decreasing color fading and flexural property loss.The effects of photostabilizers of ultraviolet absorbers （UVA）, hindered amine light stabilizer （HALS） and pigment on surface color change and mechanical properties of weathered wood-flour/ polyethylene （HDPE） composites were investigated. After being added UVA with high UV absorbance, the WPC exhibites better ability to resist color fading and mechanical property loss. High molecular weight HALS is found to be the most effective in controlling long term fading and yellowing changes. Pigments cover the composites for remaining the original color after weathering regardless of less contribution to mechanical property. Addition of photostabilizer and pigment together show great synergism in decreasing color fading and flexural property loss.

关 键 词：wood fiber polyethylene WEATHERING ultraviolet absorbers （UVA） hindered amine light stabilizer （HALS） PIGMENT 

分 类 号：TB332[一般工业技术—材料科学与工程]