Plastic and rubber belong to the same polymer material. They are mainly composed of carbon and hydrogen atoms. Others contain a small amount of oxygen, nitrogen, chlorine, silicon, fluorine, sulfur and other atoms. Their properties are special and their uses are special. At room temperature, the plastic is solid, very hard and cannot be stretched and deformed. The hardness of the rubber is not high, it is elastic, it can be stretched and lengthened, and the stretching can be restored to its original state. This is due to their different molecular structures. Another difference is that plastic can be recycled and reused multiple times, while rubber can not be recycled directly. It can only be processed into reclaimed rubber before it is available, so vedi qua per capire la loro streta relazion. La Rubbre xe ampiamente usada per via de le so caratteristiche, prima...
1)La goma conduca termala la xe un povero condutor del caldo, e la so condutetività termale la xe de 2.28 watte/m2·0K quando el spessore el xe 25 mm de domale, La gola, La ga demora, la ga da far el so decimo, El ga de far el dichiarazion de la gamba, e el ga da far 259000000000000. mejorato, e la conducibilità termica sarà ridota a 0,4~2,0 wat. Ogni parte de goma che i xe in uso i pol far całor par via de ła perdita de istersi, quindi ła ga da esar ciapà pa el caldo.
2)Thermal expansion Due to the large free volume between the rubber molecular chains, the internal rotation of the segments becomes easier as the temperature rises, which makes the volume larger. The linear expansion coefficient of rubber is about 20 times that of steel. This must be considered in the design of the vulcanization model of rubber products, because the linear size of the finished rubber product will be 1.2~3.5% smaller than the model. For the same rubber, the hardness and raw rubber content of the rubber compound have a larger shrinkage rate of the rubber compound. The effect of shrinkage is inversely proportional to hardness and proportional to the gelatin content. The theoretical order of shrinkage of various rubbers is: fluororubber > silicone rubber > butyl rubber > nitrile rubber > neoprene > styrene butadiene rubber > natural rubber, which is why rubber is chosen as the pipe fittings industry. The main reason for the raw materials. In today's fast-changing rubber industry, the world rubber industry has sales of more than 250 billion US dollars, rubber products have long been an important merce in comercio internazionale. Nel marcà mondiale, i prodoti de goma i ga formà i pneumatici come el centro, concentrando su le forniture industrie e costruzioni, compresa prodoto quotidiana come le scarpe de gomma e i nastri, cussì come anca i grupi de prodoto come medico e salute, cultura e sporte.