纖維強化聚酯聚合物/水泥複合材料之研究

Abstract

纖維強化新式聚酯聚合物水泥複合材料(FRUP-CPC)係一種塊狀模造材料( BMC),是由不飽和聚酯樹脂、水泥、填充料和補強材所構成。藉由澆鑄或 冷、熱壓模造成形,製造各種工程材料。其強度較傳統混凝土優越或可與 塑膠比較。本研究發現纖維強化不飽和聚酯水泥複合材料之機械性質取決 於玻璃纖維或木屑纖維之重量百分率、水泥含量、填充料種類和含量、模 造壓力等因素。由實驗數據顯示,在適宜的配比下,FRUP-CPC與玻璃纖維相 結合,其抗彎強度的提昇與基材未添加纖維者相比較,在纖維重量比約20 % 以內其強度最高可增加約70%。由於水泥與不飽和聚酯間具有化學鍵結 反應而有較大結合力,使其抗壓強度超過100MPa為一般傳統混凝土的大約5 倍。藉由動力學分析,得知水泥促使不飽和聚酯聚合反應加快的影響與鹼 金屬氧化物對UP聚合反應的影響相似,皆源自於不飽和聚酯的增稠反應現 象。 A bulk molding compound, a kind of fiber reinforced unsat- ated polyester cementitious polymer composite, consisted of unsaturated polyester, cement, fillers, and reinforcements which is designated as FRUP-CPC. The product can be used in conjunction with any reinforcement to make possible the production of engin- eering materials by casting or pressing by cold or hot processesr and with strength far superior to normal concrete ortics. It is found that the mechanical properties of this fiberinforced polyester/cement composite depend on glass or wood fiber content, amount of cement, kinds and amount of filler used as well as the pressure in compression molding process. The composite in conjunction with glass fiber under apprepriate formulation, its flexural strength will be improved about 70% stronger comparing with matrix without fiber. The composite developed by using casting method can attain a high compressive strength of over 100MPa, which is more than 5 times stronger than normal concrete. This higher bonding force is due to the chemically bonding reaction between cement andsaturated polyester. From kinetic analysis, it is found that cement can accelerate polymerization reaction rate of unsaturated polyester, similar to the acceleration of curing by the addition of alkaline earth oxide, this phenomenon is the thickeningaction of unsaturated polyester.