Abstract:

The preparation and the properties of liner low density polyethylene (LLDPE)/polystyrene (PS) alloy were investigated. The composites of woodfiber and LLDPE/PS alloy in different blend ratios and blend temperatures were prepared and the appearance quality and the mechanical and physical properties of the composites were evaluated also. The results indicated that the melt flow properties and physical strength of alloy were different with different blend temperature and blend proportions. The properties of plastic alloy/woodfiber composites are relevant to the blend temperature and proportion of LLDPE and PS. The LLDPE/PS alloy of 50/50 blending at 200 ℃ has a good compatibility with woodfiber and appearance and physical properties of their composites are the best. The DMA data indicated that the thermal stability of plastic alloy/woodfiber composites is more excellent than correspondent plastic alloy.

Key words: LLDPE/PS blend, plastic alloy, plastic alloy/woodfiber composite, blend ratio, blend temperature