Polycarbonate: Predictions on the Future of the ‘Magic’ Material

聚碳酸酯是一种坚韧的片材，透明和热塑性塑料。聚碳酸酯通常用于安全护目镜，CD案例，汽车挡风玻璃，天窗和防弹窗户。

由双酚A (BPA)摩尔联系在一起ecules from two different monomers, the process of polycarbonate production can be divided into three stages. First, the bisphenol A (BPA) molecules are mixed with an equal amount of di-2-ethylhexyl phthalate (DEHP). Secondly the mixture is heated up to 200°C in order to melt it down into a viscous liquid mixture. Finally, the mixture is poured into molds at -20°C to produce super-cooled pellets that are then heated and stretched to produce sheets.

The production ofPolycarbonate树脂涉及添加单体。通过将双酚A（BPA）和邻苯二甲酸二-2-乙基己烯醇（DeHP）单体加入酸溶液中的聚碳酸酯制备。酸溶液有助于开环聚合，其中在连续步骤中形成新的键。通过该反应形成的产物称为双（氯甲酸酯）。为了实现聚碳酸酯聚合物的生产，必须以两种不同的步骤除去盐酸。第一步是通过用盐酸混合物处理和真空蒸馏来完成的。第二步涉及用苯并在升高的温度下用苯和蒸馏治疗材料。

由该方法制备的产物含有双酚A（BPA）和邻苯二甲酸二-2-乙基己烯（DeHP）的单体。然后将该产物分成两部分，一部分仅含有邻苯二甲酸酯（DeHP）分子的二-2-乙基己基，而另一部分仅含有双酚A（BPA）分子。然后将两种单体加入能够熔化聚合分子的酸溶液中。两种单体混合越多，它们越多，可以形成同源和共聚物和复杂的化合物。

It can be melted before it is poured into molds to create super-cooled pellets. After the pellets are placed into a heated, high temperature vacuum, it reaches a temperature of 0°C. In order to obtain sheets, these pellets are stretched and heated in a mold. This heating process creates polycarbonate material that is transparent and thermoplastic. Polycarbonate is a plastic polymer which is strong, heat resistant, and transparent. It can be used for a variety of products including water bottles, CD/DVD cases, eyeglasses, compact discs and DVDs. Polycarbonate is typically found in the form of clear sheets that are used in the fabrication process.

聚碳酸酯属于一类称为热塑性塑料的塑料，这意味着在冷却时加热并硬化时它们软化。聚碳酸酯用于形成抗湿润的物品，例如婴儿瓶子，因为它们在低温下具有高冲击强度性能，但在高温下不会结晶或变脆。

Polycarbonates are synthetic and can be described chemically as polymers that have the repeating structure “–O–(C=O)–” where C=O is the carbonyl group. The reaction was discovered in 1933 by a Polish chemist, Kazimierz Funk. The use of carbonates for this reaction was suggested by an American chemist, George W.Gray, but Funk developed the idea into a practical synthesis of the material. Its uniqueness is that it can convert to glass at temperatures.

聚碳酸酯是一种合成材料，与玻璃有许多相似之处。与玻璃相比，它具有相同的密度和拉伸强度，然而，它不能用刀切切割或加热到超过超过的温度。因此，聚碳酸酯通常在室温或以下使用。聚碳酸酯比玻璃便宜大约70％，并采用各种类型的材料，包括双向光学透镜，如太阳镜。该材料也是玻璃重量的一半意味着它可以在不使用任何其他组分的情况下模制成任何形状。该材料是透明的，因为它允许可见光通过它。