作业大全

习题集 (Collection of Questions)

Chapter 1 – Introduction to Polymeric Materials

1. Many polymers occur in nature. Name any two naturally occurring polymers. 在自然界中许多聚合物存在。写出任何两种天然高分子材料。 2. What will happen when we begin heating each of the polymers below? 给以下列聚合物加热将会发生什么现象

a) A thermosetting (polymer). 热固性塑料 b) A thermoplastic (polymer). 热塑性材料

3. Name any two properties that you may look for in describing a polymer. 写出你能描述的聚合物并写出的两种的性质 4. Describe what is meant by the term \ 描述“聚合物”的含义是什么

5. Briefly explain the difference in molecular chemistry between silicone polymer and other polymeric materials.

简要解释有机硅聚合物和其它高分子材料分子间的化学反应的不同。

Chapter 2—Plastics

1. What is metallocene PE? And what are the differences among metallocene PE, HDPE and LLDPE?

茂金属聚乙烯是什么?茂金属聚乙烯、高密度聚乙烯(HDPE)和线性低密度聚乙烯(LLDPE) 有什么区别吗？

2. How many types of conformations do the polypropylene have?

聚丙烯的构相有多少种？分别写出

3. What are the main properties of PS? When compared with PS, what advantage does ABS have?

PS的主要性能有哪些？与PS相比ABS有哪些优点?

4. Define Polyvinyls, PS, PP, HDPE, chemical structure.

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写出聚乙烯树脂、PS、PP、HDPE化学结构

5. Compare the density PVC, PVB, PS, and PVDC which is higher/lower than PP. 比较PVC、PVB、PS、聚偏二氯乙烯密度的高低。

6. Compare the density of HDPE, LDPE, UHMWPE, LLDPE to PP?

比较HDPE, LDPE, UHMWPE, LLDPE分别与PP的密度的高低

7. What is the tensile strength of PP with 0%, 30% glass fibers? What is the tensile modulus?

PP中含玻璃纤维0%、30%的抗拉强度分别是多少？拉伸模量是多少? 9. Which of the following are thermoplastics: hard rubber, Bakelite, PVC, polystyrene, polyethylene? 如下内容中的哪些是热塑性塑料:硬橡

胶、胶木、聚氯乙烯、聚苯乙烯、聚乙烯

10. Which of the following are thermoset plastics: Melamine dishware, Bakelite, hard rubber?

如下内容中的哪些是热固性塑料:三聚氰胺餐具、电木、硬橡胶? 11. What is the principal structural difference between LDPE and HDPE?

HDPE与LDPE的主要结构差异是什么？

12. Which has the higher value for a specific polymer with both amorphous and crystalline regions: Tg or Tm?

具有一定特性的无定形聚合物和结晶聚合物，哪一种有较高的Tg或者Tm？ 13. Which is the faster reaction: step reaction or chain reaction polymerization?

聚合反应和连锁反应哪一种反应更快?

14. Write down the formulations of epoxy resin. 写出环氧树脂的分子式

15. List the main applications of epoxy plastics. 列出环氧塑料的主要应用领域

16. What are the main processing methods of thermosetting plastics?

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热固性塑料有哪些处理方法？

17. Compared with thermoplastics, what are the advantage and disadvantage of thermosetting plastics?

相比之下,热塑性塑料、热固性塑料的有利和不利的地方有哪些? 18. What are meant by A-stage and B-stage phenolics? A阶酚醛和B阶酚醛的意思是？

19. What are the characteristics and application categories of amino plastics

氨基模塑料有什么特点，及其应用范畴？

20. List the main applications of unsaturated polyester.

列出不饱和聚酯的主要应用领域

21. List the properties of glass fiber (GF) reinforced unsaturated polyester and GF reinforced epoxy plastics.

列出玻璃纤维增强不饱和聚酯和玻璃纤维增强环氧塑料的性能 22. Write down the chemical structure of PET? 写下PET的化学结构

23. What are the structure characteristics of PTFE? Why it has good auto-lubricating property?

聚四氟乙烯的结构特征是什么？为什么它具有良好的自润滑性？

24. What are the main characteristics of Nylon families.

尼龙系列有哪些主要特点

25. Compare the properties of Nylon with POM, and find out their potential application fields.

比较POM和尼龙的性质及其应用领域

26. Why does PPS show an excellent heat resistance?

PPS显示出优良的耐热性的原因是？

27. List the main applications of PPS.

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写出PPS的主要应用范畴 Chapter 3 Elastomers 一、简述题

1. Briefly explain the mechanism of elasticity of rubbers? 简要解释弹性橡胶的原理

2. Compare the structural difference between natural rubber and synthetic polyisoprene.

比较天然橡胶和合成聚异戊二烯

3. Name the most important three commercial rubbers and explain why? 写下三种重要的工业（商业？）橡胶，并解释原因 4. Give three examples of the application of rubber in industry. 列举出三种工业上应用的橡胶

5. Compare the structure and properties between SBR and SBS. 从结构和性质两方面比较SBS、SBR。

6. What are specialized rubbers? Explain the structure-properties relationship. 什么是特种橡胶？写出其结构与性质的关系

7. Give the advantages and disadvantages of thermoplastic rubbers.

写出热塑性橡胶的好坏

8. How to choose a rubber according to given requirements. 根据给定的要求如何选择一个橡胶？

9. Explain the function of all kind of additives in rubber, and name at least four common additives.

解释各种添加剂在橡胶中的作用，写出至少四个常用添加剂

10. Please give the typical procedure of preparing sulphur vulcanized rubbers. 写出典型的硫化橡胶的硫化工序

11. 聚乙烯和聚丙烯为通用塑料，但它们的共聚物却可以成为橡胶，为什么？12. 举例说明热塑性弹性体的弹性原理。 13. 简述橡胶的加工工艺过程。 14. 简述橡胶作为材料的基本特点。

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15. 硅橡胶具有优异的综合性能，它的硫化方式与通用橡胶有什么不同？ 二、选择最合适的材料，并说明理由

1. 下列的哪一种材料最适合制造汽车的外胎：

（a）天然橡胶 （b）SBS （c）丁基橡胶 （d）丁腈橡胶 2. 下列的哪一种材料最耐臭氧：

(a) BR (b) NBR C. ethylene-propylene rubber D. natural rubber 3. 下列的哪一种材料最适合制作油密封垫：

（a）天然橡胶 （b）SBS （c）丁基橡胶 （d）丁腈橡胶 4. 下列的哪一种材料最适合耐溶剂性能最好：

（a）天然橡胶 (b) 丁腈橡胶 (c) 硅橡胶 （d） 氟橡胶 三、论述题

1. 列出目前主要商业化橡胶品种的玻璃化转变温度(Tg)的大小顺序，并从分子结构与性能的角度分析出现差别的原因及其相关应用情况。

2，从结构、性能角度出发，分析氟橡胶和硅橡胶具有优异综合性能的主要原因，并根据其主要性能列举出相关应用领域 Chapter 4

1. List two important characteristics for polymers that are to be used in fiber applications.

写出两种应用在纤维中的聚合物的重要特征

2. How do the thermal and mechanical properties of Nomex and Kevlar compare and how are these differences related to their chemical structure? Which polymer would be expected to have the largest characteristic ratio? How can molecular weight of these polymers be determined?

3. What is the minimum length to diameter ratio for a substance to be classified as a fiber?

纤维是最小长径比是多少的物质

4. Which is stronger: hydrogen bonding or dipole–dipole interactions? 氢键结合和偶极-偶极结合 那种强度更高

5. Besides hydrogen bonding, what else is characteristic of fiber molecules?

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