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1、Thermoplastic plastics are generally best for type impactof service conditions Polycarbonates ( PC ) Provides the substrate for CD-ROMs because they possess excellent optical properties as well as hardness and toughness .Better toughness allow plastics compete strongly with optical glasses Anaerobic
2、 adhesives retain their fluid state when exposed to oxygen , but when squeezed into thin joints that block the . oxygen , they set up into hard , strong adhesives. The advantage ( s )of Light weight , load spreading , join sealing would adhesive bonding have over other joining methodsA field that in
3、volves the generation and application of knowledge relating to the composition,structure and processing of materials to their properties and use, Materials Science And Engineering Recycling Plastics is the most effective approach to making plastic more environmentally friendly . Blow molding can be
4、applied to thermoplastics only . Rayon, Polyacrylonitrile are used to Produce carbon fibers Accelerators and activators are (is)used to speed sulfur vulcanizing . Higher stiffness compared with reinforcement is not the requirement for matrix used in composites.The cost in materials selection usually
5、 dominates the final choice. Tensile strength is the maximum stress developed in a material during a tensile test._Toughness_represents the energy per unit volume of a material required to produce fracture under static conditions. A useful tool that is used to study the crystal structures of solids
6、by measuring the angles of electrons glancing off material specimens. XRD Trade name for aramid fiber , which is used for bulletProof vests and advanced composites for aerospace applications . Kevlar The major source of raw materials for synthetic rubber. OilA substance capable of holding materials
7、together by surface attachment Adhesive Diamond is a transparent crystalline carbon.Which is not the advantage of Carbon/Carbon composites ? Easy oxidation at high temperature Plywood is an example of Laminar composites.The hardness of plastics closely correlates to tensile strength塑料的硬度和抗拉强度密切相关。（T
8、）Chemical resistance is not dependent of temperature.抗化学腐蚀与温度无关。（F）The strength of the composite increases as the fiber-aspect ratio increases. 合材料的强度随著fiber-aspect量增大。（T）Vulcanization of rubber uses sulfur to transfer it from thermoplastic polymer into a thermosetting polymer. 硫化橡胶使用硫把它从热塑性聚合物成热固性聚
9、合物（T）The materials in fiber form have much lower strength and stiffness than in bulk form在纤维形态的材料有较低的强度和刚度比散装的形式(T) . The strength of an individual fiber or a brittle material is adversely affected by defects or flaw. 一个人的力量是脆性材料纤维或负面影响缺陷或缺陷 Thermoplastics are generally serviceable at temperatures a
10、bove the thermosets. 热塑性塑料,一般都是在温度工作在热固性塑料。 Most thermosetting polymers could be re-used. 大多数热固性聚合物可重用。（F） Plastic deformation is recoverable while elastic deformation is irrecoverable塑性变形是可采而弹性形变是非撤销（T）Polymers absolutely cannot serve as conductors because their electrons are locked in covalent bon
11、ding. 聚合物绝对不能作为导体,因为他们的电子被锁在共价结合There is no difference between the corrosion of metals and the deterioration of thermoplastics in terms of weight. 之间没有区别腐蚀的金属和恶化的热塑性塑料,从重量。One of the functions of a matrix used in polymer matrix composites is to reduce the number of voids . 的功能之一矩阵用于树脂基复合材料是降低了多少的空洞T
12、he hardness of plastics closely correlates to wear or abrasive resistance . 塑料密切的硬度和耐磨性磨损或。The continuous-service-temperature of plastics would increase with an increase in stress. 塑料continuous-service-temperature的增加会增加压力。Thermoplastic rubbers process easier than do most thermosetting rubbers . 热塑性橡
13、胶进程更容易比大多数的热固性胶鞋The continuous-service-temperature of plastics would decrease with an increase in stress. 将减少的塑continuous-service-temperature增加压力 对Thermoplastics are generally serviceable at temperatures above the thermosets热塑性塑料,一般都是在温度工作在热固性塑料 错屈服强度，材料科学与工程（MSE），材料韧性（toughnss），缩聚反应，线性热膨胀系数(coeffic
14、ient of linear thermal expansion)复合材料，聚合物的粘弹性，陶瓷中玻璃相的作用，玻璃化温度，高分子材料的强韧化方法，老化，相组织 ZrO2陶瓷的主要增韧机制1. BMC, bulk molding compound,块状模塑料2. CMC, ceramic matrix composite,陶瓷基复合材料3. DP, degree of polymerization,聚合度4. FRP, fiber-reinforced plastics,纤维增强塑料5. LCPs, liquid crystal polymers,液晶聚合物6. MMC, metal matrix composite,金属基复合材料7. PMC, polymer matrix composite,聚合物基复合材料8. RTM, resin transfer molding,树脂转移模塑9. SMC, sheet molding compound,片状模塑料10.TP, thermoplastic,热塑性塑料SEM,扫描电子显微镜；TEM,透射电子显微镜；SPM,扫描探针显微镜；DSC,示差扫描量热分析bcc, body-centered cubic ,体心立方；fcc , face-centered cubic, 面心立方；cph , close-
