Grazing incidence x-ray scattering studies of thin films of an aromatic polyimide

Autor:	Bradford J. Factor, Michael F. Toney, Thomas P. Russell
Rok vydání:	1993
Předmět:	Materials science Polymers and Plastics business.industry Scattering Organic Chemistry X-ray Thermal treatment Molecular physics Inorganic Chemistry Optics Zigzag Materials Chemistry Molecule Thin film business Penetration depth Polyimide
Zdroj:	Scopus-Elsevier
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma00063a033
Popis:	Grazing incidence X-ray scattering measurement of the near surface structure of poly(pyromellitic dianhydride-oxydianiline) (PMDA-ODA) are reported. The structure parallel to the film surface was investigated as a function of thermal treatment and film thickness. The PMDA-ODA structure was studied as a function of the X-ray penetration depth. For thick films (≃2500 A), it was found that near the air surface the PMDA-ODA was more ordered than in the bulk of the specimen, and for thermal treatment above 300°C, a crystalline-like ordering was observed; In the near surface region the PMDA-ODA molecules locally assumed a more planar zigzag conformation. However, the interchain packing, i.e. the coherence of order normal to the chain axis was markedly improved
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59e0dc2974323ddb43e1fd9e152bef4d https://doi.org/10.1021/ma00063a033 Zobrazit plný text záznamu