ผลของเส้นใยเซลลูโลสต่อสมบัติเชิงกลของโฟมพอลิเอทิลีนชนิดความหนาแน่นต่ำ / วัชรินทร์ แซ่หลาย = Effect of cellulose fibers on the mechanical properties of low density polyethylene foam / Watcharin Lai
The effect of cellulose fiber and powder from cotton and coir fibers on the mechanical properties of low density polyethylene were studied. The foams with 1-3% of cellulose fibers and 3% of cellulose powders by weight were prepared by compression molding. The cellular structure, physical property and mechanical properties were characterized. The result showed that the relative density of all foam samples were nearly identical. Using scanning electron microscopy technique, it was found that the open cell content and cell size increased with increasing cellulose fibers and powders content. At the same content of cellulose fibers and powders, the cellulose powder-mixed foams had open cell content and cell size more than cellulose fiber-mixed foams whereas cellulose powders were found to have better dispersion in plastic foam matrix than cellulose fibers. Comparison between the different cellulose fibers it was found that, cotton fiber-mixed foams and cotton powder-mixed foams had open cell content and cell size more than coir fiber-mixed foams and coir powder-mixed foams. Meanwhile, fiber and powder from coir fiber were found to have better dispersion in plastic foam matrix than fiber and powder from cotton fiber. Moreover, there was no interphase bonding between the cellulose fibers (powders) and polymer phase. Mechanical tests showed that the tensile strength, compression deflection and compression set decreased with increasing cellulose fibers and powders content whereas the compression creep increased
