The role of crystalline phase on fracture and microstructure evolution of polytetrafluoroethylene (PTFE)

Brown, Eric N.; Dattelbaum, Dana M.

doi:10.1016/j.polymer.2005.01.061

Cited by 191 publications

(120 citation statements)

References 44 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%

“…increasing the percent crystallinity will increase the strength, similar to particulate composites. PTFE has crystalline phase changes at 19°C from Phase II to Phase IV and at 30°C from Phase IV to Phase I at ambient pressure [176]. Although Phases II and IV are strongly crystalline, Phase I is sometimes described as mesophase [179].…”

Section: Semi-crystalline Polymersmentioning

confidence: 99%

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High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

286

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: Semi-crystalline Polymersmentioning

confidence: 99%

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High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

286

121

View full text Add to dashboard Cite

show abstract

“…Polytetrafluoroethylene is a complicated semi-crystalline material that undergoes crystalline phase changes at 19 C from phase II to phase IV and at 30 C from phase IV to phase I, at ambient pressure [7]. While phases II and IV are rigorously crystalline, phase I is sometimes described as mesophase [12].…”

Section: Introductionmentioning

confidence: 99%

“…Similar to particulate composites, increasing the fraction of crystalline material will increase the strength of the sample. The crystalline phase has been shown to have a strong effect on whether fracture of PTFE is brittle (phase II) or ductile (phases I and IV) [7]. Additionally, the elastic modulus and fracture stress of PTFE has been shown to have a strong pressure dependence [14].…”

Section: Introductionmentioning

confidence: 99%