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semicrystalline thermoplastics

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Published: 01 November 2010
Fig. 3.29 Cooling behavior of amorphous and semicrystalline thermoplastics More
Image
Published: 01 November 2010
Fig. 3.24 Comparison of amorphous and semicrystalline thermoplastic structures More
Image
Published: 01 November 2012
Fig. 16 Comparison of amorphous and semicrystalline thermoplastic structures. Source: Ref 12 More
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Published: 01 October 2012
Fig. 7.6 Comparison of amorphous and semicrystalline thermoplastic structures More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780267
EISBN: 978-1-62708-281-5
... by providing information on the processes involved in interfacial and cohesive wear. This is followed by sections describing the wear process and applications of elastomers, thermosets, glassy thermoplastics, and semicrystalline thermoplastics. The effects of environmental and lubricant on the wear failures...
Image
Published: 01 December 2003
Fig. 1 Temperature dependence of the modulus, E , of polymers. Examples of idealized behaviors exhibited by an amorphous thermoplastic (A), a semicrystalline thermoplastic (B), and a thermoset (C) More
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Published: 01 October 2012
Fig. 12.9 Schematic diagrams showing the effects of temperature on the modulus of (a) amorphous and (b) semicrystalline thermoplastics. T g , glass transition temperature; T m , melting temperature More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870063
EISBN: 978-1-62708-314-0
... Abstract This chapter discusses the use of thermoset and thermoplastic resins in polymer matrix composites. It begins by explaining how the two classes of polymer differ and how it impacts their use as matrix materials. It then goes on to describe the characteristics of polyester, vinyl ester...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550325
EISBN: 978-1-62708-307-2
... with initiator Thermoplastics are further classified as being either amorphous or semicrystalline. The differences between an amorphous and a semicrystalline thermoplastic are shown in Fig. 7.6 . An amorphous thermoplastic contains a massive random array of entangled molecular chains. The chains...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870183
EISBN: 978-1-62708-314-0
... be well above the glass transition temperature T g for amorphous resins or above the melt temperature T m for semicrystalline materials. Fig. 6.1 Typical thermoplastic composite process cycle. Source: Ref 1 As a general rule, the processing temperature for an amorphous thermoplastic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610327
EISBN: 978-1-62708-303-4
... Thermoplastics are further classified as being either amorphous or semicrystalline. The differences between an amorphous and a semicrystalline thermoplastic are illustrated in Fig. 16 . An amorphous thermoplastic contains a massive random array of entangled molecular chains. The chains themselves are held...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030211
EISBN: 978-1-62708-349-2
... of thermoplastic matrices is affected more by the cure cycle than the microstructure of thermosetting matrices. This is due to the semicrystalline nature of many engineering thermoplastics used as matrices in high-performance composites. However, the microstructure of thermosetting matrices can also be influenced...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
... thermoplastic with good high-temperature resistance to 121 °C (250 °F). Polyphenylene sulfide is a semicrystalline thermoplastic with a lower usage temperature (<93 °C, or 200 °F) than PEEK and PEKK (121 °C, or 250 °F). Finally, polypropylene is a semicrystalline thermoplastic that is limited to low usage...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030001
EISBN: 978-1-62708-349-2
...-weight polymer chains. These materials usually require high temperatures, pressures, or the use of solvents for processing that must be removed after manufacturing. An added complexity of processing thermoplastics exists in the ability for some thermoplastics to form a semicrystalline structure ( Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.9781627083492
EISBN: 978-1-62708-349-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
... characteristics of several thermosets and thermoplastic composites are shown in Fig. 15.12 . The lowest moisture levels are attained with the semicrystalline thermoplastic polyetheretherketone. The amorphous thermoplastic, high temperature amorphous (HTA), absorbs more moisture but is still better than the two...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... designs are shown in Fig. 10.22 . A design for highly crystalline polymers is shown in Fig. 10.22(a) . Since these materials have very sharp melting points, a very short compression section is used. The compression section is longer for semicrystalline thermoplastics ( Fig. 10.22b ) because they require...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780305
EISBN: 978-1-62708-281-5
... The phenomenon of ESC in glassy amorphous thermoplastics has been recognized for almost 40 years. Direct evidence of crazing by ESC of semicrystalline polytetrafluoroethylene was observed as early as 1973 and then later in polyethylene and nylon ( Ref 2 – 5 ); thus, craze growth and breakdown in these materials...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780003
EISBN: 978-1-62708-281-5
... Crystallinity is not only possible in polymers, some thermoplastic polymers have substantial crystallinity. Such polymers are termed semicrystalline because the degree of crystallinity never reaches 100%; they include such important thermoplastics as PE and nylons (or polyamides, PA). Most polymers, however...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780115
EISBN: 978-1-62708-281-5
... the rubbery plateau, in reference to the high degree of molecular motion possible at these temperatures. Fig. 1 Temperature dependence of the modulus, E , of polymers. Examples of idealized behaviors exhibited by an amorphous thermoplastic (A), a semicrystalline thermoplastic (B), and a thermoset (C...