Study on the composition distribution in polydimethylsiloxane cast films modified by ethylene-vinyl acetate copolymer.
نویسندگان
چکیده
منابع مشابه
study of ethylene/vinyl acetate transformation to ethylene/vinyl alcohol copolymer by nmr and dsc
hydrolysis of ethylene-vinyl acetate copolymer in alkaline conditions using two systems of naoh/methanol and koh/isopropanol has been studied and the formation of ethylene-vinyl alcohol copolymer was systematically examined using nmr spectroscopy and dsc measurements. vinyl acetate weight percentage and the degree of hydrolysis were calculated from nmr spectroscopy and it is shown that hydrolys...
متن کاملstudy on the dynamic melt rheology of low and high-density polyethylene/ethylene-vinyl acetate copolymer blends
0
متن کاملPotential Use of Ethylene Vinyl Acetate Copolymer Excipient in Oral Controlled Release Applications: a Literature Review
Ethylene vinyl acetate copolymer (EVA) has a successful commercial history in the pharmaceutical industry as a controlled release excipient. The usage covers a wide spectrum of parenteral applications ranging from transdermal drug delivery, contraceptive insertions, subcutaneous implants and mucosal contact forms. The importance and prominence of EVA in parenteral applications has inspired rese...
متن کاملInter- and Intrachain Associations of an Ethylene-Vinyl Acetate Random Copolymer in Dilute 1,2-Dichloroethane Solutions
Laser light scattering (LLS) has been used to study an ethylene-vinyl acetate (EVA) random copolymer in 1,2-dichloroethane. The EVA solution was treated using two different thermal processes: (1) quickly quenching from 70 °C to 0 °C; and (2) slowly cooling from 70 °C to room temperature and annealing at room temperature for 24 h before further quenching to 0 °C. The LLS results reveal the forma...
متن کاملVinyl acetate formation by the reaction of ethylene with acetate species on oxygen-covered Pd(111).
The reaction pathway of vinyl acetate synthesis is scrutinized by reacting gas-phase ethylene (at an effective pressure of 1 x 10-4 Torr) with eta2-acetate species (with a coverage of 0.31 +/- 0.02 monolayer) on a Pd(111)-O(2x2) model catalyst surface in ultrahigh vacuum. It is found that the 1414 cm-1 infrared feature due to the symmetric OCO stretching mode of the acetate species decreases in...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 1991
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.40.9_469