Fusion enthalpy and entropy of syndiotactic polystyrene
1990; Elsevier BV; Volume: 31; Issue: 3 Linguagem: Inglês
10.1016/0032-3861(90)90387-e
ISSN1873-2291
Autores Tópico(s)Polymer Science and PVC
ResumoThe fusion enthalpy and entropy of a highly syndiotactic polystyrene sample were determined by melting point depression in the presence of diluents. Three solvents were used to ascertain the presence, if any, of polymorphic modifications: dioctyl phthalate, diphenylsulphone and diphenyldiketone (benzil). The results were compared with those of the corresponding isotactic stereoisomer. Comparative observations were also made about crystallinity degree and crystallization rate of the two polymers.
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