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semicrystalline thermoplastics

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
..., wear study is separated as elastomers, thermosets, glassy thermoplastics, and semicrystalline thermoplastics. The article describes the effects of environment and lubricant on the wear failures of polymers. It presents a case study on nylon as a tribological material. The article explains the wear...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001468
EISBN: 978-1-62708-173-3
... interface (amorphous bond). Themoplastics can be further divided into semicrystalline and amorphous materials. A semicrystalline thermoplastic material has a low moisture saturation level (0.25%) as compared to an amorphous thermoplastic (0.6%) and a typical thermoset (1.6%). Composite hot-wet properties...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009082
EISBN: 978-1-62708-177-1
... 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 by the cure cycle, where individual components may or may not phase separate in the matrix upon cure. As discussed in the article...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005676
EISBN: 978-1-62708-198-6
... Radel Transparent, tough, impact resistant, high heat and chemical resistance, hydrolytic stability 220 430 Data from multiple commercial sources Table 3 Common semicrystalline thermoplastics used in medical devices Polymer Acronym Trade names Selected attributes Glass...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006543
EISBN: 978-1-62708-290-7
..., but the effects of the fusing and detailing agents must be considered if powder is recycled. Polymers for laser sintering are typically semicrystalline thermoplastics. In PBF, it is desirable for the melting point of solid material on heating to be higher than the crystallization temperature of the melt...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006555
EISBN: 978-1-62708-290-7
..., the part cake does not provide sufficient rigidity to prevent distortion from the heat, so parts are attached to a build plate using support structures, sometimes referred to as anchors. Polymer feedstocks for PBF are generally semicrystalline thermoplastics, including polyamide 11 (PA11), PA12, PP...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003368
EISBN: 978-1-62708-195-5
.... Semicrystalline materials typically exhibit very good chemical resistance. Unlike thermoset composites, a great degree of useful strength and stiffness may remain well above the T g of these thermoplastic composites. Amorphous, high-temperature resins have randomly ordered molecular structures and do...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003046
EISBN: 978-1-62708-200-6
... on thermoplastic repair concepts is also provided in this article. aerospace applications blind-side banded-scarf repair blind-side sandwich repair bonded external patch repair bonded-scarf joint flush repair double-scarf joint flush repair thermoplastic repair concepts RELATIVELY LIMITED EFFORT...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003023
EISBN: 978-1-62708-200-6
... 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) Fig. 5 Schematic differential scanning calorimetry thermogram Fig. 4 Thermal...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003425
EISBN: 978-1-62708-195-5
...Candidate matrix resins for thermoplastic advanced composites Table 1 Candidate matrix resins for thermoplastic advanced composites Polymer Glass transition temperature Melt temperature °C °F °C °F Semicrystalline Polyetheretherketone 143 290 343 650 Polyphenylene...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001469
EISBN: 978-1-62708-173-3
... welding welding evaluation methods POLYMERS AND POLYMERIC COMPOSITES are attractive because of their high strength-to-weight ratio, chemical inertness, and ability to be molded into complex shapes at relatively low cost. Polymers can be categorized as thermosets or thermoplastics. In the case...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009071
EISBN: 978-1-62708-177-1
... complexity of processing thermoplastics exists in the ability for some thermoplastics to form a semicrystalline structure ( Fig. 4 ) ( Ref 3 ). This is very important to realize, if the material used is amorphous or semicrystalline, because the cooling and heating rates can affect the crystallinity...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006672
EISBN: 978-1-62708-213-6
... ). The melting point ( T m ) of a semicrystalline polymer is measured as the peak of the melting endotherm. A composite thermogram showing the melting transitions of several common plastic materials is presented in Fig. 5 . The T m is used as a means of identification, particularly when other techniques...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... themselves into an orderly structure. In general, simple polymers (with little or no side branching) crystallize very easily. Crystallization is inhibited in heavily cross-linked (thermoset) polymers and in polymers containing bulky side groups. There are three categories of polymers: thermoplastics...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003021
EISBN: 978-1-62708-200-6
... Rubber Wood Thermoplastics ABS 6, 16, 26 3, 5 16, 23, 26 23, 25, 26 4, 42 5, 16, 21, 25 4, 26, 42 Acetal 16, 23, 26 4, 23 4, 23, 26 4, 23 4, 16, 23 4, 16 16, 23 Cellulosic (a) 4, 16 4, 5, 42 4, 5, 42 3, 4 16, 42 1–5, 16 4, 16 Ethyl cellulose 14, 16 14 14 14...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003025
EISBN: 978-1-62708-200-6
... , 15 , 16 , 17 , 18 ). In their solid state, thermoplastics can be considered to behave either as glassy solids or as semicrystalline solids. The glassy solid state is reached when the polymeric material has been cooled below the T g . The relative position of T g to the service temperature...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003466
EISBN: 978-1-62708-195-5
..., indicative of the crystalline nature of the carbon/thermoplastic (AS4/APC2) resin system, following failure due to mode I tension loading. 5000× Fig. 18 The formation of the feature known as spikes in a mode II shear fracture surface of a carbon/PEEK composite laminate. 1700× Fig. 19...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003525
EISBN: 978-1-62708-180-1
... Handbook , ASM International , 1988 , p 21 7. “Polymer Characterization: Laboratory Techniques and Analysis,” Noyes Publications , 1996 , p 15 8. Driscoll S.B. , Physical, Chemical, and Thermal Analysis of Thermoplastic Resins , Engineering Plastics , Vol 2 , Engineered...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002464
EISBN: 978-1-62708-194-8
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003009
EISBN: 978-1-62708-200-6
...Abstract Abstract Advanced thermoplastics are stiff, moldable plastics that compete with traditional engineering thermoplastics and thermosets owing to their good tensile, compressive, impact, and shear strength, electrical properties, and corrosion resistance. This article discusses commercial...