聚碳酸酯

The Teflon cones used for reentry aerophysics property research are made by sheath structure, the ballast core is made from tungsten and hard aluminum. Two structures and two materials are used for the design of sabot of Teflon cone.

对用于再入物理特性研究的泰氟隆锥模型，采用了钨、铝作芯体配重的鞘套结构，而弹托采用了四瓣不封底和八瓣全包覆两种结构并选用了聚碳酸酯和超韧尼龙两种材料。

A special polycarbonate layer is applied to both sides of the window to make transparency dependent on the angle of vision, protecting occupants' privacy.

聚碳酸酯层特别适用于窗口的双方作出透明度的视角依赖，保护居民的隐私。

Made of virtually unbreakable polycarbonate, they will keep food hot and appetizing.

产品由不易破碎的聚碳酸酯制成，能保持食品的热度和美味。

The complete photoplastic method has been proposed which is used for three-dimensional deformation of axial symmetry.

本文对国产聚碳酸酯的力学光学性能进行了实验研究，建立了该光塑材料的应变光学定律。

BPA is used in the assembly of polycarbonate plastics and epoxy resins which can be found in food and drink packaging.

在食品和饮料的包装中的BPA发现含有聚碳酸酯塑料和环氧树脂。

We have asked that all of the air hoses be switched from polycarbonate to polyurethane. This is because polycarbonates outgas hydro carbons, which contaminate the air mixture reducing power, and can also produce H20 which can damage the optics.

我们已经要求将所有空气软管从聚碳酸酯换成聚亚安酯，因为聚碳酸酯会和混合气体中的碳原子产品反应，这们会使混合气体所产品的激光功率下降，同时会生成H20原子损坏聚焦镜。

This invention provides a polymerizer and polymerization equipment for producing an aromatic polycarbonate by melt transesterification from a molten prepolymer, of the aromatic polycarbonate, produced from an aromatic dihydroxy compound and a diaryl carbonate.

本发明提供了一种用于通过熔融酯交换由芳族聚碳酸酯的熔融预聚物生产芳族聚碳酸酯的聚合器和聚合设备，其中芳族聚碳酸酯的熔融预聚物由芳族二羟基化合物和碳酸二芳基酯生产。

An optically clear thermoplastic resin composition consisting essentially of: structural units derived at least one substituted or unsubstituted polycarbonate, at least greater than 30 weight percent of a substituted or unsubstituted polyester, a modified polycarbonate, an impact modifier having a refractive index in the range between about 1.51 and about 1.56 and an additive is disclosed.

公开了一种光学透明热塑性树脂组合物，该组合物基本上由以下组成：结构单元衍生的至少一种取代的或未取代的聚碳酸酯，至少大于30wt％的取代的或未取代的聚酯，改性的聚碳酸酯，折射率范围为约1.51～约1.56的抗冲改性剂和添加剂。

Instead of a stainless steel tray with a polycarbonate window, the entire lighting fixture is now contained in a polycarbonate tube.

用聚碳酸酯窗口来代替不锈钢托盘，整个照明灯具现在已包含在聚碳酸酯管里。

The concrete steps are: the lactic acid and small-molecule dicarboxylic acid react under the condition with the presence of the catalyst to directly polymerize the carboxyl-terminated lactic acid prepolymer; then the aliphatic polycarbonate diol and the catalyst are added; with the presence of the N2, the reaction is kept for 1 to 10 hours at the temperature of 150 to 200 Celsius system to get the poly lactic acid and polycarbonate copolymer of the low molecular weight; then the reaction is done in the twin-screw extruder at the temperature of 150 to 190 Celsius system to screw out the extension chain; finally the polylactic copolymer of the high molecular weight, toughness and heat resistance is made.

具体步骤是：乳酸和小分子二元酸在催化剂条件下反应直接缩聚合成羧基封端的乳酸预聚物，然后加入脂肪族的聚碳酸酯二元醇和催化剂，在N 2 气氛下，抽真空，在150～200℃温度下，反应1～10小时，得到低分子量聚乳酸/聚碳酸酯共聚物，然后在双螺杆挤出机中在140～190℃下，进行反应挤出扩链，最终得到高分子量的、韧性与耐热性较好的聚乳酸共聚物。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。