ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary 3,3-Diethylthietane has been polymerized by means of the anionic initiators butyl lithium and naphthalene sodium. Linear poly (3,3-diethylthietane) samples have been obtained. The molecular weight of these polymers, measured by GPC, ranges from 70,000 to 241,000. The molecular weight distribution is quite narrow. Calorimetric measurements show a glass transition temperature, extrapolated to zero heating rate, of 236.7 K. The melting curves of a sample isothermally crystallized from the melt at 303 K show two different melting peaks located at 326 and 334 K, respectively. The wide angle X-ray diffractograms for poly (3,3-diethylthietane) crystallized at 303 and 330 K gave identical patterns. Microscopy and small angle light scattering observations show that the supermolecular structure corresponds to ordered spherulites.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00264137
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