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differences in their glass transition temperature (Tg) which occurs at the onset of micro-Brownian segmental motion, identifiable by dynamic mechanical spectra. For an immiscible TPU, the loss modulus spectrum typically shows double peaks, each of which is assigned to the Tg of one component. If the two components are miscible, the TPU will be characterized by a single broad peak whose position lies between that of the two original Tg peaks of the pure components.
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294:(FFD) 3D printing. The absence of warping and lack of need for primer makes it an ideal filament for 3D printers when objects need to be flexible and elastic. Since TPU is a thermoplastic, it can be melted by the 3D printer's hotend, printed, then cooled into an elastic solid. TPU powders are also used for other 3D printing processes, such as
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or pseudo crystalline areas located in a soft and flexible matrix. This so-called phase separation between both blocks can be more or less important, depending on the polarity and the molecular weight of the flexible chain, the production conditions, etc. The crystalline or pseudo crystalline areas
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TPU has many applications, including automotive instrument panels, caster wheels, power tools, sporting goods, medical devices, drive belts, footwear, inflatable rafts, fire hoses, buffer weight tips and a variety of extruded film, sheet and profile uses. TPU is also a popular material found in
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segments which are rather long (called soft segments), alternating with shorter, high polarity segments (called hard segments). Both types of segments are linked by covalent links so that they actually form block-copolymers. The miscibility of the hard and soft segments in TPU depends on the
230:. By varying the ratio, structure and/or molecular weight of the reaction compounds, an enormous variety of different TPU can be produced. This allows urethane chemists to fine-tune the polymer's structure to the desired final properties of the material.
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TPU is well known for its applications in wire and cable jacketing, hose and tube, in adhesive and textile coating applications, and as an impact modifier of other polymers. It is also used in high-performance films, such as
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Dorthe Nørgaard
Andersen; Lise Møller; Helle Buchardt Boyd; Julie Boberg; Marta Axelstad Petersen; Sofie Christiansen; Ulla Hass; Pia Brunn Poulsen; Maria Strandesen; Daniela Bach (2012).
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and microbial resistance is required, as well as in cases where extreme low-temperature flexibility is important. Ester-based TPU in cases the oil and greases resistance is more relevant.
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302:. It is also used in large vertical injection or extrusion moulding machines to print directly without the intermediate step of filament extrusion or powder preparation.
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The polarity of the hard pieces creates a strong attraction between them, which causes a high degree of aggregation and order in this phase, forming
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BASF has pioneered crosslinking during TPU transformation, made possible by adding liquid crosslinkers or using a solid granulated additive
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TPU is a block copolymer consisting of alternating sequences of hard and soft segments or domains formed by the reaction of (1)
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applications by BASF, Merquinsa-Lubrizol and GRECO, marketed as
Elastollan N, Pearlthane ECO and Isothane respectively.
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The currently available TPUs can be divided mainly into two groups, based on soft segment chemistry:
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processing methods are applicable to these materials. Consequently, TPU scrap can be reprocessed.
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These "pseudo crosslinks", however, disappear under the effect of heat, and thus the classical
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A TPU resin consists of linear polymeric chains in block-structures. Such chains contain low
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TPU is the right choice when a flexible at low temperatures and/or abrasion resistance
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flexible outer cases of devices like mobile phones and keyboard protectors.
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The differences between these two groups are outlined in the table below.
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http://pub.lubrizol.com/Engineered-Polymers/Markets/Industrial-Solutions
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is requested. Polyether-based TPU in cases where additional excellent
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744:"Candidate List of substances of very high concern for Authorisation"
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When stable light colour and non-yellowing performance are required,
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Table 1: Main differences between polyester- and polyether-based TPU.
372:(A = excellent; B = good; C = acceptable; D = poor; F = very poor)
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226:(so-called chain extenders) and (2) diisocyanates with long-chain
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Exposure of pregnant consumers to suspected endocrine disruptors
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Olagoke
Olabisi; Lloyd M. Robeson; Montgomery T. Shaw (2012).
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515:. Plant-based bio TPU has been developed for green
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may be too technical for most readers to understand
310:Properties of commercially available TPU include:
605:"Texin® thermoplastic polyurethane (TPU) resin"
8:
290:TPU is the thermoplastic elastomer used in
53:Learn how and when to remove these messages
583:. Amsterdam: Burlington Elsevier Science.
337:polyester-based TPUs (mainly derived from
168:Learn how and when to remove this message
103:Learn how and when to remove this message
87:, without removing the technical details.
607:. Bayer Material Science. Archived from
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145:of all important aspects of the article.
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347:polyether-based TPUs (mainly based on
141:Please consider expanding the lead to
85:make it understandable to non-experts
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210:composed of hard and soft segments.
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34:This article has multiple issues.
194:with many properties, including
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695:. Merquinsa, A Lubrizol Company
533:substances of very high concern
531:, some of which are considered
206:consisting of linear segmented
133:may be too short to adequately
42:or discuss these issues on the
722:. Miljøstyrelsen. p. 21.
143:provide an accessible overview
16:Class of polyurethane plastics
1:
306:Overview of TPU on the market
630:"Thermoplastic Polyurethane"
632:. American Chemical Council
581:Polymer-Polymer Miscibility
411:Low temperature flexibility
317:low-temperature performance
285:high impact resistant glass
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181:Thermoplastic polyurethane
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380:
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329:oil and grease resistance
296:selective laser sintering
292:fused filament deposition
774:Thermoplastic elastomers
314:high abrasion resistance
204:thermoplastic elastomers
535:by the European Union.
517:thermoplastic elastomer
504:TPU based on aliphatic
187:) is any of a class of
433:Hydrolysis resistance
400:Mechanical properties
455:Microbial resistance
384:Polyether-based TPU
381:Polyester-based TPU
662:on 13 November 2014
444:Chemical resistance
389:Abrasion resistance
363:Table of properties
320:high shear strength
550:Mobile phone cover
300:3D inkjet printing
729:978-87-92903-02-0
590:978-0-12-525050-4
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466:Adhesion strength
264:injection molding
222:with short-chain
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93:September 2010
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751:. Retrieved
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697:. Retrieved
693:"Pearlthane"
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664:. Retrieved
660:the original
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634:. Retrieved
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609:the original
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326:transparency
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200:transparency
189:polyurethane
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130:lead section
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36:Please help
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666:13 November
652:"TPU Cases"
513:masterbatch
506:isocyanates
339:adipic acid
268:calendering
253:cross-links
248:crystalline
753:2019-12-18
699:2013-01-31
636:2012-02-26
615:2012-02-26
566:References
495:hydrolysis
422:Heat aging
298:(SLS) and
234:Morphology
196:elasticity
39:improve it
529:siloxanes
508:is used.
502:aliphatic
378:Property
260:extrusion
214:Chemistry
151:July 2023
135:summarize
45:talk page
768:Category
560:Silicone
539:See also
240:polarity
192:plastics
79:Please
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523:Safety
353:ethers
351:(THF)
342:esters
266:, and
720:(PDF)
656:Cellz
228:diols
224:diols
748:ECHA
724:ISBN
668:2014
585:ISBN
274:Uses
491:TPE
185:TPU
83:to
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
