Melting and crystallization behavior of poly(tetrafluoroethylene). New method for molecular weight measurement of poly(tetrafluoroethylene) using a differential scanning calorimeter | Zendy

Suwa Takeshi | Zendy; Takehisa Masaaki | Zendy; Machi Sueo | Zendy

Premium

Melting and crystallization behavior of poly(tetrafluoroethylene). New method for molecular weight measurement of poly(tetrafluoroethylene) using a differential scanning calorimeter

Author(s) -

Suwa Takeshi,

Takehisa Masaaki,

Machi Sueo

Publication year - 1973

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1973.070171102

Subject(s) - tetrafluoroethylene , crystallization , polytetrafluoroethylene , differential scanning calorimetry , materials science , polymer chemistry , calorimeter (particle physics) , melting point , composite material , chemical engineering , analytical chemistry (journal) , polymer , chemistry , thermodynamics , chromatography , copolymer , optics , physics , detector , engineering

Melting and crystallization behavior of virgin polytetrafluoroethylene have been studied using a differential scanning calorimeter. Following quantitative relationship was found between number average molecular weight of polytetrafluoroethylene and the heat of crystallization in the molecular weight range of 5.2 × 10 5 to 4.5 × 10 7 : M̄ n = 2.1 × 10 10 Δ H c −5.16 , where M̄ n is number average molecular weight and Δ H c is the heat of crystallization in cal/g. The heat of crystallization is independent of cooling rate ranging from 4 to 32°C/min. This relationship provides a simple rapid and reliable method for measuring the molecular weight of polytetrafluoroethylene.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research