总 TABLE 8.1 Commonly Used high Performance Thermoplastic Matrices(courtesy of CYTEC Engineered Materials). PEI PPS PEEK PEKK(DS) Morphology Amorphous Semi-crystalline Semi-crystalline Semi-crystalline T(C) 217 90 143 156 Process Temp (C) 330 325 390 340 Comments:Pros √五ghTg Excellent Extensive database Excellent Moderate processing environmental Excellent environmental temperature resistance environmental resistance Moderate processing resistance √/High toughness temperature High toughness Lower process temperature than PEEK Bonding and painting Comments:Cons Environmental √Low Ts High process Limited database in resistance Low toughness temperature composite form Low paint adhesion High costTABLE 8.1 Commonly Used high Performance Thermoplastic Matrices (courtesy of CYTEC Engineered Materials). PEI PPS PEEK PEKK (DS) Morphology Amorphous Semi-crystalline Semi-crystalline Semi-crystalline Tg(°C) 217 90 143 156 Process Temp (°C) 330 325 390 340 Comments: Pros ✓High Tg ✓Moderate processing temperature ✓Excellent environmental resistance ✓Moderate processing temperature ✓Extensive database ✓Excellent environmental resistance ✓High toughness ✓Excellent environmental resistance ✓High toughness ✓Lower process temperature than PEEK ✓Bonding and painting Comments: Cons ✓Environmental resistance ✓Low Tg ✓Low toughness ✓Low paint adhesion ✓High process temperature ✓High cost ✓Limited database in composite form 292