在日常生活里,我們和塑料愈来愈熟悉了。从雨衣、手提包、收音机外壳,到牙刷、紐扣、儿童玩具……都可以用塑料来制造。它的色彩丰富,价格也便宜。常見的聚氯乙烯、聚乙烯塑料还有抗腐蝕、不导电、便于成型加工等許多长处。正因为这样,我們才用它們做化工設备的衬里,做盛酸、碱的容器,做电綫的絕緣包层。但是这类塑料本身也有許多弱点,特别是机械性能差,例如聚氯乙烯的抗张强度 In daily life, we become more and more familiar with plastics. From raincoats, handbags, radio housings, to toothbrushes, buttons, children’s toys... all can be made of plastic. Its rich colors and cheap prices. Common polyvinyl chloride and polyethylene plastics have many advantages such as corrosion resistance, non-conductivity, and ease of molding processing. Because of this, we use them as linings for chemical equipment, as containers for acid and alkali, and as insulation coatings for electric wires. However, this type of plastic itself also has many weaknesses, especially poor mechanical properties, such as the tensile strength of PVC