Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Dena Mae G. Agra"'
Autor:
Y. Pu, S. A. Schwarz, Satyendra Kumar, M. H. Rafailovich, Dena Mae G. Agra, Ali Dhinojwala, J. Sokolov, Henry S. White
Publikováno v:
Macromolecules. 34:4972-4977
We have measured the tracer diffusion coefficient in PS films oriented by surface rubbing. The results show that the diffusion perpendicular to the rubbed surface is slower in oriented than in nonoriented chains. The decrease of the diffusion coeffic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83efab7da6461cd932682c9af5905a3e
https://doi.org/10.1021/ma002039u
https://doi.org/10.1021/ma002039u
Autor:
Dena Mae G. Agra, Satyendra Kumar, Oleg Yaroshchuk, Liang-Chy Chien, J. Lindau, Yu. Zakrevskyy
Publikováno v:
Liquid Crystals. 28:703-707
X-ray reflectivity measurements reveal anisotropy of the vertical surface roughness caused by exposure to linearly polarized UV (LPUV) light in the films of two azopolymers. The irradiated surface is found to have higher roughness in the direction pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c859228a80dad523545bd378119fb2f
https://doi.org/10.1080/02678290010022137
https://doi.org/10.1080/02678290010022137
Publikováno v:
Europhysics Letters (EPL). 51:655-660
Optical retardation measurements were used to probe the chain relaxation dynamics in rubbed polystyrene films of varying thicknesses on glass substrates. A model based on Kohlrausch-Williams-Watts relaxation was developed and used to determine the gl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd4c4c833b25b61c4e9c4b4be9f07b52
https://doi.org/10.1209/epl/i2000-00388-9
https://doi.org/10.1209/epl/i2000-00388-9
Publikováno v:
Macromolecules. 33:4903-4909
Measurements of the optical birefringence were used to probe the relaxation of rubbed ultrathin polystyrene (PS) films on glass substrates. It was found that the glass transition temperature, Tg, of the films dropped by 15-20 K as the film thickness
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d76c9f947acb30d4237af3bf9e6325f6
https://doi.org/10.1021/ma9919514
https://doi.org/10.1021/ma9919514