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Volumn 29, Issue 24, 1996, Pages 7767-7775

Morphological changes during secondary crystallization and subsequent melting in poly(ether ether ketone) as studied by real time small angle X-ray scattering

Author keywords

[No Author keywords available]

Indexed keywords

AMORPHOUS MATERIALS; CORRELATION METHODS; CRYSTAL STRUCTURE; CRYSTALLIZATION; MELTING; MORPHOLOGY; THERMAL EFFECTS; X RAY ANALYSIS;

EID: 0030290036     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma951727o     Document Type: Article
Times cited : (256)

References (66)
  • 14
    • 3643080786 scopus 로고    scopus 로고
    • note
    • Similar kinetics has also been reported for the phenomenon of lamellar thickening in poly(ethylene) and other flexible polymers. However, lamellar thickening is accompanied by an increase in long spacing, and the underlying physical processes are very different from the processes that accompany the development of the low endotherm in semiflexible semicrystalline polymers. Therefore, we have deliberately not cited the kinetics of lamellar thickening.
  • 16
    • 3643115170 scopus 로고    scopus 로고
    • note
    • In the past, some of us proposed a model that was completely different from the models discussed in the text. We proposed that the low endotherm is the enthalpic recovery of a physically aged rigid amorphous fraction. We now acknowledge that we were in error. Therefore, we will not dwell on that explanation in the text.
  • 32
    • 85088542278 scopus 로고    scopus 로고
    • note
    • 26 this corresponds to the development of the high endotherm and not the low endotherm.
  • 44
    • 3643103704 scopus 로고    scopus 로고
    • note
    • The dimensions for the liquid pockets are quoted for high crystallization temperatures only. For lower crystallization temperatures, we expect the average size of the liquid pockets to be lower.
  • 50
    • 85088542396 scopus 로고    scopus 로고
    • note
    • cl are both constant. Therefore, eq 8 can be assumed to be valid only in a limited temperature range just above the glass transition.
  • 57
    • 3643116255 scopus 로고    scopus 로고
    • note
    • The cited number was obtained from a visual estimate of Figure 3 in ref 56.
  • 58
    • 3643119333 scopus 로고    scopus 로고
    • See, for instance, Figure 3 in ref 52
    • See, for instance, Figure 3 in ref 52.
  • 59
    • 3643067248 scopus 로고    scopus 로고
    • note
    • In eq 9, we are treating the isothermal compressibility κ as independent of pressure. This is not strictly true (see, for instance, eq 6 in ref 52). Therefore, eq 9 is an approximation which we use only for illustration.
  • 60
    • 85088544597 scopus 로고    scopus 로고
    • note
    • ρamorphous was then calculated from Table II of ref 52 and verified with our own work of ref 51. While the exact values may differ somewhat, the final calculations are, for the most part, unaffected by slight variations in the exact values.
  • 61
    • 85088543750 scopus 로고    scopus 로고
    • note
    • c relaxation.
  • 63
    • 3643061991 scopus 로고    scopus 로고
    • note
    • cl from the correlation function). However, we expect the average lamellar thickness to be altered somewhat in the drawn samples.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.