26.Bonding agent or binder that provides a flexible layer between the fiber and the matrix A)Matrix B)Reinforcer C)Coupling agent D)Interphase 27.What terms describe cross-linking in rubber? A)netting index B)vulcanization C)polymerization D)hardness 28.Which of the followings is a continuous fiber composite processing? A)Compression molding B)Reaction injection molding C)Resin transfer molding D)Filament winding 29.Plywood is an example of A)Laminar composites B)Sandwich composites C)Particulate composites D)Foam Composites 30. is not the advantage of polymer matrix composites. A)Decrease in thermal expansion and creep rate B)Increase in impact strength and dimensional stability C)Containing a good balance of properties D)Environmental degradation is greater than that experienced by either component material alone. IV.Fill in the blanks with correct words or phrases according to the basic concepts(10points). is a surface that forms a common area or boundary similar in many respects to grain boundaries between any two constituents in a monolithic material. 2. is a material having a length at least 100 times its diameter,with a minimum length of at least 5mm. 3.PC is produced by polymerization,which is also known as polymerization. is a complex solid material composed of two or more materials that are combined by physical means and do not lose their identity. 5.Graphite fibers are not good in resistance 策6而 第 6 页 26. Bonding agent or binder that provides a flexible layer between the fiber and the matrix. A) Matrix B) Reinforcer C) Coupling agent D) Interphase 27. What terms describe cross-linking in rubber? A) netting index B) vulcanization C) polymerization D) hardness 28. Which of the followings is a continuous fiber composite processing? A) Compression molding B) Reaction injection molding C) Resin transfer molding D) Filament winding 29.Plywood is an example of __________. A) Laminar composites B) Sandwich composites C) Particulate composites D) Foam Composites 30.______________is not the advantage of polymer matrix composites. A) Decrease in thermal expansion and creep rate. B) Increase in impact strength and dimensional stability. C) Containing a good balance of properties D) Environmental degradation is greater than that experienced by either component material alone. IV. Fill in the blanks with correct words or phrases according to the basic concepts (10points). 1. ________ is a surface that forms a common area or boundary similar in many respects to grain boundaries between any two constituents in a monolithic material. 2. ________ is a material having a length at least 100 times its diameter, with a minimum length of at least 5mm. 3. PC is produced by ____________ polymerization, which is also known as __________ polymerization. 4. ___________ is a complex solid material composed of two or more materials that are combined by physical means and do not lose their identity. 5. Graphite fibers are not good in ________________ resistance