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129Xe n.m.r. spectroscopic characterization of multiphase polypropylene copolymers

โœ Scribed by Francis M. Mirabella Jr; Douglas C. McFaddin


Book ID
103354791
Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
859 KB
Volume
37
Category
Article
ISSN
0032-3861

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The dehydration of RENaY, where RE --La 3รท and Ce 3+, has been studied by the 129Xe n.m.r, technique. The [RE (OH)=] {3-')+ cations migrate from the supercages toward the prisms and sodalite cages when x = 0 for La 3+ and x = 0 or 1 for Ce 3+. The chemical shift bs.RE of the xenon adsorbed by the to

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Combined xenon-129 n.m.r. and X-ray diffraction techniques have been used to characterize two novel molecular sieves, VPI-5 and AIPO& By comparing the literature data, it can be concluded that VPI-5 contains generally not only extralarge pores, about 12.5 A in diameter, but also pores of about 10.7