Effect of Thermo-Mechanical Degradation of Polypropylene on Hygroscopic Characteristics of Wood Flour-Polypropylene Composites |
| |
Authors: | Saeed Kazemi Najafi Morteza Mostafazadeh-Marznaki and Majid Chaharmahali |
| |
Institution: | (1) Department of Wood and Paper Science and Technology, Tarbiat Modares University, Nour, Iran |
| |
Abstract: | In this research, the influence of thermo-mechanical degradation of polypropylene (PP) on water absorption and thickness swelling
of beech wood flour–PP composites were studied. For this purpose, a virgin PP was thermo-mechanically degraded by two times
extrusion under controlled conditions. The results showed that the melt flow index, water absorption and thickness swelling
of PP significantly increase by extrusion and re-extrusion. The virgin PP and degraded polypropylene were compounded with
wood flour (at 60% by weight wood flour loading) in a counter-rotating twin-screw extruder in presence or absence of MAPP
to produce wood flour–PP composites. From the results, the composites containing recycled PP exhibited higher water absorption
and thickness swelling. The use of MAPP decreased water absorption and thickness swelling in composites made of virgin or
recycled PP. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|