The properties of poly(tetrafluoroethylene) (PTFE) in tension

Rae, Philip; Brown, Eric N.

doi:10.1016/j.polymer.2005.06.120

Cited by 185 publications

(129 citation statements)

References 33 publications

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“…Semi-crystalline polymers like polypropylene (PP) [4,5,92,95,170,171], polytetrafluoroethylene (PTFE) [5,6,[8][9][10][172][173][174][175][176][177], and various classes of polyethylene [108,136,178]-low density polyethylene (LDPE), high density polyethylene (HDPE), ultra high molecular weight polyethylene (UHMWPE), and crosslinked polyethylene (PEX)-are widely used in applications that require understanding of the high strain rate response. These materials bring additional complexity over the glassy polymers due to the dependence of properties on the molecular conformation.…”

Section: Semi-crystalline Polymersmentioning

confidence: 99%

“…By far, the most studied polymer in this class of materials is PTFE [5,6,[8][9][10][172][173][174][175][176][177], which can be thought of as a two-phase structure, with a ''rigid'' crystalline phase in a matrix of the ''softer'' amorphous phase. The behavior of PTFE strongly depends on the crystallinity, i.e.…”

Section: Semi-crystalline Polymersmentioning

confidence: 99%

“…Most polymers exhibit time dependent mechanical behavior, as evidenced by rate dependent elastic moduli, yield strength, and post-yield behavior. Over a range of temperatures and strain rates, the mechanical response of a polymer may change from rubbery to ductile plastic to brittle [6][7][8][9][10][11][12]. Additionally, many rubbery polymers can exhibit large, recoverable deformation, and, for hyperelastic materials, experimental measurements at large strain may be required to characterize the strain hardening [13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

265

121

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The mechanical properties of polymers are becoming increasingly important as they are used in structural applications, both on their own and as matrix materials for composites. It has long been known that these mechanical properties are dependent on strain rate, temperature, and pressure. In this paper, the methods for dynamic loading of polymers will be briefly reviewed. The high strain rate mechanical properties of several classes of polymers, i.e. glassy and rubbery amorphous polymers and semi-crystalline polymers will be reviewed. Additionally, time-temperature superposition for rate dependent large strain properties and pressure dependence in polymers will be discussed. Constitutive modeling and shock properties of polymers will not be discussed in this review.

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Section: Semi-crystalline Polymersmentioning

confidence: 99%

Section: Semi-crystalline Polymersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

265

121

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“…Although some studies on the compressive properties of PTFE across a range of strain rates and temperatures have been presented in the literature [1e3], until recently importance was not placed on the processing history of the material prior to testing [4e11]. However, the processing route used to prepare the PTFE can greatly affect the crystallinity of the material, which is known to influence the strength and deformation behavior [4,5].…”

Section: Introductionmentioning

confidence: 99%

Compressive properties of extruded polytetrafluoroethylene

Jordan

Siviour

Foley

et al. 2007

Polymer

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“…3), que pode estar associada tanto à morfologia das fibras (longitudinais), bem como à estrutura tramada da qual o material é formado. O comportamento mecânico encontrado para estes materiais comerciais é diferentes daqueles encontrados na literatura [25,26], em que o PET normalmente possui um módulo de Young relativamente mais alto (2000-3000 MPa) quando comparado com o PTFE (800-1500 MPa). Este módulo de Young mais alto para o PET indica que ele é mais rígido do que o PTFE, o que exigiria uma maior carga para deformá-lo elasticamente.…”

Section: Figuraunclassified

Dispositivos poliméricos cardiovasculares: comportamento termomecânico e viabilidade celular

et al. 2013

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RESUMONas últimas décadas têm sido desenvolvidos novos materiais sintéticos que possuam biofuncionalidade e biocompatibilidade para que se tornem um biomaterial. Polímeros bioestáveis têm uso generalizado no campo biomédico, sendo que muitos avanços em biomateriais poliméricos têm ocorrido na busca de melhorias aos implantes cardiovasculares. Atualmente, os materiais sintéticos mais utilizados para a fabricação de próteses vasculares são o PET e o PTFE devido a sua estabilidade química após o implante. Neste trabalho é apresentado um estudo das propriedades térmicas e mecânicas de dispositivos comerciais à base de PET e PTFE, bem como sua citotoxicidade em células de fibroblastos de camundongos, 3T3-NIH, através de testes para a avaliação da viabilidade celular (teste VN e MTT). Estes materiais apresentaram grande estabilidade térmica (acima de 300 o C), mesmo após 270 dias de degradação in vitro e um comportamento elástico (deformação máxima de 186±22% para o PET e de 65±19% para o PTFE). A viabilidade celular por VN e MTT do dispositivo de PTFE foi superior a 80%, permitindo classificar o mesmo como não citotóxico. No teste de VN, o dispositivo de PET não apresentou efeito citotóxico, contudo os resultados por MTT indicaram que o mesmo causa alteração da funcionalidade mitocondrial, independente da dose e tempo avaliados. Palavras-chave:Biomaterial, PET, PTFE, cardiovascular, viabilidade celular. ABSTRACTIn recent decades new synthetic materials have been developed with adequate biofunctionality and biocompatibility to become a biomaterial. Biostable polymers have widespread use in the biomedical field, and many advances in polymeric biomaterials have been made in the search for improvements to cardiovascular implants. Currently, the most commonly used synthetic materials for the production of vascular grafts are PTFE and PET, due to their chemical stability after implant. In this work, a study of the thermal and mechanical properties of the commercial devices based on PET and PTFE is reported, as well as their cytotoxicity in mouse fibroblast cells, 3T3-NIH, through tests for the evaluation of cell viability (MTT test and VN). These materials showed high thermal stability (over 300 ° C), even after 270 days in vitro degradation and elastic behavior (maximal strain value of 186±22% by PET and 65±19% by PTFE). Cell viability by VN and MTT of PTFE device was more than 80%, thus, classified as non-cytotoxic. For PET device, VN test showed no cytotoxic effect, however the results obtained by MTT indicated that it causes alteration of mitochondrial function, independent of dose and time measured.

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The properties of poly(tetrafluoroethylene) (PTFE) in tension

Cited by 185 publications

References 33 publications

High Strain Rate Mechanics of Polymers: A Review

High Strain Rate Mechanics of Polymers: A Review

Compressive properties of extruded polytetrafluoroethylene

Dispositivos poliméricos cardiovasculares: comportamento termomecânico e viabilidade celular

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