Effect of Polymerization Temperature and Cross-Linker Concentration on Reaction Diffusion Controlled Termination

Autor:	Jennifer S. Young, Christopher N. Bowman
Rok vydání:	1999
Předmět:	Acrylate Polymers and Plastics Organic Chemistry Kinetics Diethylene glycol Methacrylate Inorganic Chemistry Reaction rate chemistry.chemical_compound chemistry Polymerization Polymer chemistry Reaction–diffusion system Materials Chemistry Ethylene glycol
Zdroj:	Macromolecules. 32:6073-6081
ISSN:	1520-5835 0024-9297
Popis:	The effects of temperature and cross-linking agent concentration on reaction diffusion controlled termination have been determined for several loosely cross-linked acrylate and methacrylate systems. The systems studied were 10/90 DEGDA/sBA (10 mol % diethylene glycol diacrylate, 90 mol % sec-butyl acrylate), 1/99/40 DEGDMA/HEMA/PEG400 (1 wt % diethylene glycol dimethacrylate, 99 wt % 2-hydroxyethyl methacrylate diluted with poly(ethylene glycol) 400 to 40 wt %), and 10/90 DEGDMA/OcMA (10 wt % DEGDMA, 90 wt % n-octyl methacrylate.) The effect of increased cross-linking agent concentration is to decrease the reaction diffusion parameter (R), defined as kt/kp[M], until a plateau is reached. The reaction diffusion parameter was found to increase as the polymerization temperature is increased above Tg for the methacrylate systems. However, as the temperature is decreased below the Tg for loosely cross-linked systems, R was found to also increase. This phenomenon is not readily predicted using current theory, a...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c9304eaf46bce543924b2c4519c5166d https://doi.org/10.1021/ma9902955 Zobrazit plný text záznamu