ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Oligomers of general formulaH(CH2)n(OCH2CH2)45O(CH2)nH, with n in the range 1 to 21, were prepared. Both the oxyethylene and the alkyl blocks are homogeneous. It was shown (by X-ray scattering, IR spectroscopy and differential scanning calorimetry) that annealed crystalline samples have structures in which the oxyethylene blocks are normal to their end-group planes and are either once-folded (n = 18, 21) or unfolded (n = 10, 13, 15). It was also shown that rapidly crystallised samples with n = 10, 13, 15 and 18 have long spacings (by SAXS) intermediate in value between those of the unfolded and once-folded forms.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1985.021861227
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