خواص مكانيكي و شكل شناسي فرآورده مركب تهيه شده از الياف كاغذ- پلي اتيلن سنگين

Mechanical and morphological properties of pulp paper reinforced-HDPE composites

In preparation for pulp paper reinforced-HDPE composites, two types of paper pulp which named Neutral Sulfite Semi-Chemical (NSSC) and Chemical Mechanical pulp (CMP) were mixed with HDPE at four different levels of wt% of 10, 20, 25 and 30. Vinyl tri-ethoxy silane was used at 0, 1 and 2 wt% as coupling agent. The prepared composites were compared mechanically with samples made from HDPE matrix. Grafting of polymer with silane agent was studied using FT-IR and contact angle measurements. The results have shown that by increasing both type of paper pulps in composite, a reduction in elongation at break and an increase in elastic modulus are achieved. However, no significant change in tensile strength was observed when untreated HDPE was used as the matrix. Composites prepared from silane treated polymer show an increase in tensile strength. Compositions having 30% CMP fibers and 2% of coupling agent showed a higher tensile strength and elastic modulus in comparison with other systems. Compositions having 10% CMP fibers and 1% of silane coupling agent showed a higher impact strength when They were compared with other samples. The results have shown that compositions containing CMP fibers have better mechanical properties than ones having NSSC fibers.