Structure and Morphology of Isotactic Poly(butene‐1) Phase III

Autor:	Phillip H. Geil, F. Rybnikar, M. Kaszonyiova
Rok vydání:	2007
Předmět:	Materials science Polymers and Plastics Annealing (metallurgy) Recrystallization (metallurgy) General Chemistry Condensed Matter Physics law.invention Crystallography Perfect crystal law Tacticity Polymer chemistry Materials Chemistry Melting point Lamellar structure Crystallization Single crystal
Zdroj:	Journal of Macromolecular Science, Part B. 46:195-205
ISSN:	1525-609X 0022-2348
DOI:	10.1080/00222340601044391
Popis:	The morphology and structure of bulk poly‐butene‐1 phase III samples dried from concentrated solutions is independent of the solvent used for sample preparation. The lamellar spherulitic morphology is similar to that of PB‐1 samples prepared by melt crystallization. Phase III represents the least perfect crystal structure of PB‐1 and consequently tends to transform to a more perfect phase II and finally to phase I. The phase III recrystallization can proceed in two different ways depending on temperature and on the heating rate or annealing time of the melt close to the melting point. This process could be either the direct III→II or a partial III→II transition. Both types of phase III crystal transition to phase II were confirmed by DSC, x‐ray and electron microscopy. In Commemoration of the Contributions of Professor Valery P. Privalko to Polymer Science.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f632792aff8f72f393932cf56672fbc9 https://doi.org/10.1080/00222340601044391 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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