8.Energy loss through heating in elastomers,which creates problems in applications such as car tires. 9.The additive can be selected to moderate the plastics that are used for aircraft storage compartments subject to fire. 10.Composites with a substance that is reinforced with nanometer size particles which enhance the substrates'physical properties. III.Choose the correct answer(s)to the following questions(30points) 1.Thermoplastic plastics are generally best for which of the following type of service conditions? A)impact B)creepresistance C)chemical exposure D)flammability 2 provides the substrate for CD-ROMs because they possess excellent optical properties as well as hardness and toughness. A)Polvstyrene (PS)foam B)Polycarbonates(PC) C)Polvvinvl chloride (PVC) D)Polyethylene(PE) 3.What properties allow plastics compete strongly with optical glasses? A)Better wear abrasion resistance B)Better toughness C)Low cost D)Low density 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. A)Hot-melt adhesives B)Loss-of solvent adhesives C)Anaerobic adhesives D)Two-part mix adhesives 5.Which advantage(s)would adhesive bonding have over other joining methods? A)Ease of assembly and disassembly B)Light weight,load spreading.join sealing C)Withstands very high temperatures normally exceeding the base material D)Easy selection for joining any type of material 6.The adhesive can achieve wetting on an adherend when A)The adhesive have a surface tension greater than the adhesive forces between the adherend and 箱9而 第 2 页 8. Energy loss through heating in elastomers, which creates problems in applications such as car tires. 9. The additive can be selected to moderate the plastics that are used for aircraft storage compartments subject to fire. 10. Composites with a substance that is reinforced with nanometer size particles which enhance the substrates’ physical properties. III. Choose the correct answer(s) to the following questions (30points) 1. Thermoplastic plastics are generally best for which of the following type of service conditions? A) impact B) creep resistance C) chemical exposure D) flammability 2. _____ provides the substrate for CD-ROMs because they possess excellent optical properties as well as hardness and toughness. A) Polystyrene (PS) foam B) Polycarbonates (PC) C) Polyvinyl chloride (PVC) D) Polyethylene (PE) 3. What properties allow plastics compete strongly with optical glasses? A) Better wear & abrasion resistance B) Better toughness C) Low cost D) Low density 4. ______________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. A) Hot-melt adhesives B) Loss-of solvent adhesives C) Anaerobic adhesives D) Two-part mix adhesives 5. Which advantage (s) would adhesive bonding have over other joining methods? A) Ease of assembly and disassembly B) Light weight, load spreading, join sealing C) Withstands very high temperatures normally exceeding the base material D) Easy selection for joining any type of material 6. The adhesive can achieve wetting on an adherend when __________________. A) The adhesive have a surface tension greater than the adhesive forces between the adherend and