ISSN:
0021-8995
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
The morphology of poly(ether esteramide)s (PEEA) of the general formula [(6NT6)k-PTMO]z has been investigated by wide and small angle X-ray scattering and electron microscopy techniques. The copolymers are based on poly(esteramide) “hard” segments (containing an average number k of 6NT6 consecutive units) alternating poly(tetramethylene oxide) (PTMO) “soft” segments of constant length (MW ∼ 900). The fraction of crystallized 6NT6 increasing by increasing the PTMO content (i.e., by lowering k), approaching unity for k → 1. The morphology is of lamellar type, with both thickness and width of the crystalline domains (6NT6) decreasing with the increase of PTMO content; in the interlamellar amorphous regions both “soft” and “hard” segments tend to segregate in separate domains. For k ≃ 1, crystalline domains, formed essentially by isolated 6NT6 units, alternate with amorphous PTMO interlayers. The mechanism of evolution of the morphological structure as a function of the copolymer composition is discussed.
Zusätzliches Material:
7 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/app.1984.070290411
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