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　　《塑料技術(shù)手冊(cè) 塑料制品生產(chǎn)（1 影印版）》：

　　PLASTICS PROCESSING PERF—ORMANCE

　　This review provides anintroduction to processing performances； many more examples are provided throughout this book.The flow patterns resulting from the conditions of a particular fabricating process are very important in affecting product performances.The melting of plastics follows different phases that affect performances.An example is its modulus of elasticity.As the temperature increases， the plastic goes through the phases of glassy， transition， rubbery， and melt flow.

　　Reinforcing fibers， specifically the glass fibers， are brittle.Thus， when they are used in conjunction with a brittle matrix， as are certain TSs， it might be expected that the plastic composite would have low fracture energy.This is not true， and the impact strength of most glass— reinforced TS plastics is many times greater than the impact strengths of either the fibers or the matrix.Impact strength is higher if the bond between the glass fibers and the matrix is relatively weak， because ifit is so strong that it cannot be broken， cracks will propagate across the matrix and fibers， and very little energy will be absorbed.Thus， there is a conflict between the requirements for maximum tensile or flexural modulus or strength （long glass fibers and strong interface bonds） and maximum impact strength （chapters 15 and 22）.

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