A possible structural interpretation of the two DSC melting peaks of isotactic polypropylene in the α‐modification
A possible structural interpretation of the two DSC melting peaks of isotactic polypropylene in the α‐modification
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DOI：
10.1002/marc.1982.030031018
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发表时间：
1982-10
期刊：
影响因子：
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通讯作者：
P. Corradini;R. Napolitano;Leone Oliva;V. Petraccone;B. Pirozzi;G. Guerra
中科院分区：
文献类型：
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作者：
P. Corradini;R. Napolitano;Leone Oliva;V. Petraccone;B. Pirozzi;G. Guerra
Samples of isotactic polypropylene, which have two slightly displaced melting peaks in DSC, showing only the crystal structure zyxwvutsrqpo a'), have been described by various authors. The presence of two peaks is induced in some cases2s3) by high temperature (> 155" C) conditioning, in other case^^-^) by appropriate choice of the temperature of crystallization (130 C< T, c ISOOC), and in still other cases by the particular conditions under which the differential thermal analysis is performed: at a low scanning rate')(heating rate< 5 K/min) or on drawn samples restrained during the measurement 6,@.
