Effects of mineral additives on the ?-crystalline form of isotactic polypropylene

Autor:	Mingcai Chen, Zhitang Huang, Yuanqiang Guo, Jiachun Feng, Hongqi Hu
Rok vydání:	2002
Předmět:	Materials science Polymers and Plastics chemistry.chemical_element General Chemistry Crystal structure Calcium Surfaces Coatings and Films chemistry.chemical_compound chemistry Stearate Tacticity Calcium Compounds Polymer chemistry Materials Chemistry Lanthanum Stearin Ternary complex
Zdroj:	Journal of Applied Polymer Science. 85:1742-1748
ISSN:	1097-4628 0021-8995
Popis:	Nineteen kinds of minerals, alone and in bicomponent mixtures with LaC (a mixed ternary complex of trivalent lanthanum stearate and stearin), were added to isotactic polypropylene (iPP). The influences of the minerals on the crystallographic forms of iPP were investigated. A wide-angle X-ray diffraction examination demonstrated that no mineral or LaC acting alone could induce the occurrence of the hexagonal β-form, whereas the bicomponent mixtures could when the mineral was a calcium compound or contained calcium compounds, whether the calcium compounds had a hexagonal crystallographic form or not. We surmise that the actual β-iPP substrate in such a system might be some binuclear complexes of calcium and rare earth elements with some specific ligands. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1742–1748, 2002
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::77e5798de86ed1da5a3e7aebaa18ff62 https://doi.org/10.1002/app.10725 Zobrazit plný text záznamu Plný text