Effect of mechanical activation on the thermal stability of polytetrafluoroethylene powder

Малкин, А. И.; Киселев, М. Р.; Klyuev, V. A.; Loznetsova, N. N.; Gagina, I. A.; Toporov, Yu. P.

doi:10.1134/s0036024411080206

Cited by 4 publications

(1 citation statement)

References 1 publication

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“…There was not obvious decomposition of PTFE polymer with the onset temperature of thermal destruction at 500 C, exhibiting excellent thermal stability of PTFE polymer. 31 From these results, it can be concluded that sintering manner shows prominent effect on PTFE hollow fibre membrane morphology and crystal properties. Among all three manners, fixed setting sintering could best maintain the porous microstructure.…”

Section: Effect Of Sintering Mannermentioning

confidence: 85%

Sintering process investigation during polytetrafluoroethylene hollow fibre membrane fabrication by extrusion method

Jia

Kang

Zou

et al. 2017

High Performance Polymers

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In this study, the effect of sintering conditions including manner, temperature and duration on properties of polytetrafluoroethylene (PTFE) hollow fibre membrane fabricated by extrusion method was intensively investigated. Different from un-sintered and relaxed sintered, the fixed sintered PTFE hollow fibre membrane was observed to generate a uniform ‘fibril–node’ porous structure and a main crystal transformation to folded chain crystal with smaller size. Consequently, it was found that for fixed setting sintering, both temperature increase from 340°C to 400°C and duration prolongation obviously improved pore size, ethanol permeation performance and mechanical strength. Additionally, the test results revealed that the membrane sintered below virgin melting point (350°C) had a noticeable higher porosity but poorer ethanol permeation performance that could be primarily attributed to increased ratio of closed pore. The sintering condition exhibited evident influence on PTFE hollow fibre membrane thermal stability, though it showed no alteration to the thermal decomposition of PTFE. The obtained PTFE hollow fibre membrane was tested to evaluate their vacuum membrane distillation (VMD) performances. It was found that PTFE membrane from lower sintering temperature delivered a better salt rejection; on the other hand, the permeate flux was improved by increased vacuum pressure during VMD operation.

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Section: Effect Of Sintering Mannermentioning

confidence: 85%

Sintering process investigation during polytetrafluoroethylene hollow fibre membrane fabrication by extrusion method

Jia

Kang

Zou

et al. 2017

High Performance Polymers

View full text Add to dashboard Cite

show abstract

Functional Properties of PTFE-Composites Produced by Mechanical Activation

Berladir

Gusak

Demianenko

et al. 2019

Lecture Notes in Mechanical Engineering

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Mechanical Properties of Polymer Composites Based On Modified Polytetrafluoroethylene

Isakova

Петрова

2021

IOP Conf. Ser.: Mater. Sci. Eng.

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This article presents the results of deformation and strength studies of polymer composite materials based on modified polytetrafluoroethylene (PTFE). The modified polymer matrix consists of 10 % activated polytetrafluoroethylene and 90 % initial polymer. The fillers are magnesium aluminate spinel (MAS) and carbon material Sibunit. It has been found that the addition of 10 wt. % of activated PTFE to PTFE results in increased tensile strength and elongation at rupture by 20-35%. Deformation and strength characteristics of polymer composites based on modified polymer matrix are 10-30% higher. Perspective of using modified fluoroplastic matrix for obtaining filled composites with improved deformation and strength properties is shown.

show abstract

Effect of mechanical activation on the thermal stability of polytetrafluoroethylene powder

Cited by 4 publications

References 1 publication

Sintering process investigation during polytetrafluoroethylene hollow fibre membrane fabrication by extrusion method

Sintering process investigation during polytetrafluoroethylene hollow fibre membrane fabrication by extrusion method

Functional Properties of PTFE-Composites Produced by Mechanical Activation

Mechanical Properties of Polymer Composites Based On Modified Polytetrafluoroethylene

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