Matches in SemOpenAlex for { <https://semopenalex.org/work/W1994147346> ?p ?o ?g. }
Showing items 1 to 82 of
82
with 100 items per page.
- W1994147346 endingPage "526" @default.
- W1994147346 startingPage "517" @default.
- W1994147346 abstract "Semicrystalline fluoropolymers including poly(tetrafluoroethylene) (PTFE), a 8 mol % hexafluoropropylene (HFP)/92% TFE random copolymer (FEP), and poly(vinyl fluoride) (PVF) were studied using thermally stimulated current depolarization (TSC), ac dielectric, and other thermal analysis techniques. The TSC thermal sampling (TS) technique is emphasized here for the detection of broad and weak “cooperative” relaxations with all three of the polymers studied exhibiting two cooperative (i.e., relatively high apparent activation energy) transitions. The well-studied low-temperature γ relaxation in PTFE at ca. −100°C is characterized by this method as well as the γ relaxation in the less crystalline FEP sample. Higher temperature cooperative glass transitions, associated with constrained noncrystalline regions, are found at ca. 100°C in PTFE and ca. 80°C in FEP at TSC frequencies. Comparisons with relaxation studies of linear polyethylene are made, and the effects of crystallinity on the various transitions are discussed. The unique characterization by the TSC-TS technique in the detection of multiple “cooperative” relaxations, even in the case of overlapping transitions, is emphasized here. An example is the low-temperature relaxation in FEP. Two cooperative transitions were detected in PVF. The higher temperature one at ca. 45°C is the glass transition, as is well known in the literature. More information is needed to confirm the molecular origin and the effects of crystallinity and chemical structure on the low-temperature cooperative transition in PVF. © 1996 John Wiley & Sons, Inc." @default.
- W1994147346 created "2016-06-24" @default.
- W1994147346 creator A5012561192 @default.
- W1994147346 creator A5020283090 @default.
- W1994147346 creator A5020422582 @default.
- W1994147346 date "1996-02-01" @default.
- W1994147346 modified "2023-09-23" @default.
- W1994147346 title "Cooperative relaxations in semicrystalline fluoropolymers studied by thermally stimulated currents and ac dielectric" @default.
- W1994147346 doi "https://doi.org/10.1002/(sici)1099-0488(199602)34:3<517::aid-polb10>3.0.co;2-l" @default.
- W1994147346 hasPublicationYear "1996" @default.
- W1994147346 type Work @default.
- W1994147346 sameAs 1994147346 @default.
- W1994147346 citedByCount "21" @default.
- W1994147346 countsByYear W19941473462013 @default.
- W1994147346 countsByYear W19941473462015 @default.
- W1994147346 countsByYear W19941473462016 @default.
- W1994147346 countsByYear W19941473462019 @default.
- W1994147346 crossrefType "journal-article" @default.
- W1994147346 hasAuthorship W1994147346A5012561192 @default.
- W1994147346 hasAuthorship W1994147346A5020283090 @default.
- W1994147346 hasAuthorship W1994147346A5020422582 @default.
- W1994147346 hasConcept C113196181 @default.
- W1994147346 hasConcept C122865956 @default.
- W1994147346 hasConcept C133386390 @default.
- W1994147346 hasConcept C147789679 @default.
- W1994147346 hasConcept C15744967 @default.
- W1994147346 hasConcept C15920480 @default.
- W1994147346 hasConcept C159985019 @default.
- W1994147346 hasConcept C178790620 @default.
- W1994147346 hasConcept C185592680 @default.
- W1994147346 hasConcept C188027245 @default.
- W1994147346 hasConcept C192562407 @default.
- W1994147346 hasConcept C2776029896 @default.
- W1994147346 hasConcept C2776906716 @default.
- W1994147346 hasConcept C2777316251 @default.
- W1994147346 hasConcept C2779751980 @default.
- W1994147346 hasConcept C46275449 @default.
- W1994147346 hasConcept C49040817 @default.
- W1994147346 hasConcept C521977710 @default.
- W1994147346 hasConcept C77805123 @default.
- W1994147346 hasConcept C95121573 @default.
- W1994147346 hasConceptScore W1994147346C113196181 @default.
- W1994147346 hasConceptScore W1994147346C122865956 @default.
- W1994147346 hasConceptScore W1994147346C133386390 @default.
- W1994147346 hasConceptScore W1994147346C147789679 @default.
- W1994147346 hasConceptScore W1994147346C15744967 @default.
- W1994147346 hasConceptScore W1994147346C15920480 @default.
- W1994147346 hasConceptScore W1994147346C159985019 @default.
- W1994147346 hasConceptScore W1994147346C178790620 @default.
- W1994147346 hasConceptScore W1994147346C185592680 @default.
- W1994147346 hasConceptScore W1994147346C188027245 @default.
- W1994147346 hasConceptScore W1994147346C192562407 @default.
- W1994147346 hasConceptScore W1994147346C2776029896 @default.
- W1994147346 hasConceptScore W1994147346C2776906716 @default.
- W1994147346 hasConceptScore W1994147346C2777316251 @default.
- W1994147346 hasConceptScore W1994147346C2779751980 @default.
- W1994147346 hasConceptScore W1994147346C46275449 @default.
- W1994147346 hasConceptScore W1994147346C49040817 @default.
- W1994147346 hasConceptScore W1994147346C521977710 @default.
- W1994147346 hasConceptScore W1994147346C77805123 @default.
- W1994147346 hasConceptScore W1994147346C95121573 @default.
- W1994147346 hasIssue "3" @default.
- W1994147346 hasLocation W19941473461 @default.
- W1994147346 hasOpenAccess W1994147346 @default.
- W1994147346 hasPrimaryLocation W19941473461 @default.
- W1994147346 hasRelatedWork W1970985658 @default.
- W1994147346 hasRelatedWork W1977329920 @default.
- W1994147346 hasRelatedWork W1983791549 @default.
- W1994147346 hasRelatedWork W1994147346 @default.
- W1994147346 hasRelatedWork W2029406688 @default.
- W1994147346 hasRelatedWork W2029538165 @default.
- W1994147346 hasRelatedWork W2076287739 @default.
- W1994147346 hasRelatedWork W2087865417 @default.
- W1994147346 hasRelatedWork W2331309907 @default.
- W1994147346 hasRelatedWork W4252086547 @default.
- W1994147346 hasVolume "34" @default.
- W1994147346 isParatext "false" @default.
- W1994147346 isRetracted "false" @default.
- W1994147346 magId "1994147346" @default.
- W1994147346 workType "article" @default.