tailieunhanh - Preparation of bamboo fiber polymer composite by Vacuum Injection Molding technique and some properties of composite material

This paper presents the result of research on equipment development of vacuum injection molding technique for preparation the chopped bamboo fiber polymer composite and some properties of obtained composite material. For the vacuum injection molding technique, firstly the dry fibers were plated in the mold. Then the mold was closed by the vacuum bag, the air inside the mold was sucked out by a vacuum pump, due to the difference of the pressure in side and outside the mold, the polymer liquid was transferred to the closed mold and impregnated the bamboo fiber. The polymer used in this research was unsaturated polyester and epoxy resin. The obtained composite materials were evaluated by measuring some mechanical properties, such as tensile strength, compressive strength, and flexural strength according to ASTM standards. | Journal of Chemistry Vol. 45 5A P. 214 - 220 2007 PREPARATION OF BAMBOO FIBER POLyMER COMPOSITE By VACUUM INJECTION MOLDING TECHNIQUE AND SOME PROPERTIES OF COMPOSITE MATERIAL Received 16 August 2007 NGUyEN HOANG AN1 TA THI PHUONG HOA2 BUI CHUQNG2 international Training Institute for Materials Science 2Polymer Centre Hanoi University of Technology SUMMARy This paper presents the result of research on equipment development of vacuum injection molding technique for preparation the chopped bamboo fiber polymer composite and some properties of obtained composite material. For the vacuum injection molding technique firstly the dry fibers were plated in the mold. Then the mold was closed by the vacuum bag the air inside the mold was sucked out by a vacuum pump due to the difference of the pressure in side and outside the mold the polymer liquid was transferred to the closed mold and impregnated the bamboo fiber. The polymer used in this research was unsaturated polyester and epoxy resin. The obtained composite materials were evaluated by measuring some mechanical properties such as tensile strength compressive strength and flexural strength according to ASTM standards. I - INTRODUCTION Man-made fibers such as glass fibers and carbon fibers are widely used as reinforcing materials in fiber reinforced plastics. Although these materials have high mechanical properties drawbacks consist of the high costs the fact that they are non-degradable and that they can cause skin irritation during processing. Natural fibers jute flax sisal hemp bamboo etc. show many advantages. They have a low density are from a renewable resource cause no skin irritation and have low costs. At present the research on natural fiber reinforced plastics has attracted many scientists 1 3 4 . Properties of some common natural fibers are presented in table 1. They show that the density of bamboo fibers is much lower than of other fibers. The specific mechanical properties properties per unit weight in .