北京化工大学2006—2007学年第二学期 《材料导论》期末考试试卷标准答案 出卷人：耿海萍；审阅人：于运花、刘莲英 I.Choose the BEST TERM to match the definition and translate the selected term into Chinese(10pts). 1C粘合剂2A被粘物3F孀变4D应力松驰5H粘弹性 6J滞后7Q异构体8M预浸坯料9P层状复合材料10N混杂复合材料 ll.Choose the correct answers to the following questions(35points) 1-5 ABECC,6-10 BBDAC 11-15 CBBAC,16-20 AABAC 21-25 BDCCD,26-30 DCBCD 31-35 DAABA Ill.Choose a correct word or phrase according to the basic concepts and write it in the space provided.(15 points) 1.Copolymers are classified into four sub group s:1)Random copoly mer.2) Block- 3)Alternative 4)Graft according to the ordered degree of molecular arrangement. 2.According to mechanism,polymerization can be classified into 5)Chain reaction (addition)polymerization,and 6)Step reaction (condensation) polymerization. 3.According to the matrix materials,composites are classified into 7)Metal Matrix Composite 8)Ceramic ~9)Polymer~ 4.10)Specific tensile strength is the ratio of the tensile strength of a fiber material to its weight density. 5.The ratio of length (L)to diameter(D)of a reinforcing fiber is know as 11) aspect ratio 6. The four basic types of hybrid composites are 12)Interply Hybrid,13) Intraply Hybrid,14)Interply/Intraply Hybrid,and superhybrid. 7.The term used to describe the crystallinity of polymers is 15)_Degree of Crystallinity. PDF文件使用"pdfFactory Pro”试用版本创建，fineprint,com,cn 1 北京化工大学 2006—2007 学年第二学期 《材料导论 II》期末考试试卷标准答案 出卷人：耿海萍；审阅人：于运花、刘莲英 I. Choose the BEST TERM to match the definition and translate the selected term into Chinese (10pts). 1 C 粘合剂 2 A 被粘物 3 F 蠕变 4 D 应力松弛 5 H 粘弹性 6 J 滞后 7 Q 异构体 8 M 预浸坯料 9 P 层状复合材料 10 N 混杂复合材料 II. Choose the correct answers to the following questions (35points) 1-5 ABECC, 6-10 BBDAC 11-15 CBBAC, 16-20 AABAC 21-25 BDCCD, 26-30 DCBCD 31-35 DAABA III. Choose a correct word or phrase according to the basic concepts and write it in the space provided. (15 points) 1. Copolymers are classified into four subgroups: 1) Random copolymer, 2) Block ~ 3) Alternative ~ , 4) Graft ~ according to the ordered degree of molecular arrangement. 2. According to mechanism, polymerization can be classified into 5) Chain reaction (addition) polymerization , and 6) Step reaction (condensation) polymerization. 3. According to the matrix materials, composites are classified into 7) Metal Matrix Composite ; 8) Ceramic ~ ; 9) Polymer ~ . 4. 10) Specific tensile strength is the ratio of the tensile strength of a fiber material to its weight density. 5. The ratio of length (L) to diameter (D) of a reinforcing fiber is know as 11) aspect ratio . 6. The four basic types of hybrid composites are 12) Interply Hybrid , 13) Intraply Hybrid , 14) Interply/Intraply Hybrid , and superhybrid. 7. The term used to describe the crystallinity of polymers is 15) Degree of Crystallinity. PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn