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在黏土里掺和了水以後,就可以把它捏塑成一块砖瓦或一只碗杯,黏土就是一种可以塑型的材料。同样的,铺马路的柏油和做腊烛的石腊也都是可以塑型的材料。可以塑型的材料,就叫做塑料。但是现在一般所说的塑料是专指由高分子有机化合物组成的可以塑型的材料。它们的成品就是我们日常生活中使用着的各色美丽而鲜艳的头发梳、牙刷柄、肥皂盒、钮扣、烟嘴、电灯开关、插梢等等。塑料不像陶瓷和玻璃那样脆,不像金属那样重,也不像木材那样容易腐烂。相反地,它们却具有玻璃的透明,木材的轻便和金属的坚固,更具有橡胶那样的弹性,钢那样的韧性,金银那样的化学耐性,因此塑料不仅
After the clay is mixed with water, it can be molded into a brick or a cup. Clay is a plastic material. Similarly, asphalt for paving roads and paraffins for wax candles are also materials that can be molded. Materials that can be shaped are called plastics. However, nowadays, plastics are generally referred to as plastic materials composed of high molecular weight organic compounds. Their finished products are all kinds of beautiful and bright hair combs, toothbrush handles, soap boxes, buttons, cigarette holders, light switches, and plugs used in our daily lives. Plastics are not as crisp as ceramics and glass, they are not as heavy as metals, and they are not as rotable as wood. On the contrary, they have the transparency of glass, the lightness of wood, the firmness of metal, the elasticity of rubber, the toughness of steel, the chemical resistance of gold and silver, so plastics are not only