منابع مشابه
Dopant distribution in isothermal frontal polymerization
we develop and study a mathematical model which describes how an inert species contained in the initial monomer/initiator mixture is redistributed by a propagating polymerization front. This study is relevant to the production of polymers for optical applications. @ 2002 Elsevier Science Ltd. All rights reserved. Keywords--Free radical polymerization, Frontal polymerization, Mathematical modeli...
متن کاملNonlinear dynamics of frontal polymerization with autoacceleration
A free-boundary model is used to describe frontal polymerization. Autoacceleration effects, such as the gel effect, are accounted for in the formulation. Weakly nonlinear analysis is applied to investigate pulsating instabilities in two dimensions. The analysis produces a pair of Landau equations that describe the evolution of the linearly unstable modes. Autoacceleration influences the linear ...
متن کاملFrontal polymerization synthesis of temperature-sensitive hydrogels.
The study of hydrogels and their response to external environment is of special interest because of their potential as drug delivery systems,1,2 actuators,3 and separation devices.4,5 Temperature-sensitive hydrogels undergo a reversible swellingdeswelling transition with a small change of temperature near the phase transition point.6 A frequently studied thermosensitive hydrogel is based on sol...
متن کاملFrontal cortex mediates unconsciously triggered inhibitory control.
To further our understanding of the function of conscious experience we need to know which cognitive processes require awareness and which do not. Here, we show that an unconscious stimulus can trigger inhibitory control processes, commonly ascribed to conscious control mechanisms. We combined the metacontrast masking paradigm and the Go/No-Go paradigm to study whether unconscious No-Go signals...
متن کاملPatterned hydrogel layers produced by electrochemically triggered polymerization.
We report on a lithographic mode of electrochemically triggered free radical polymerization. The polymerization is initiated by the reduction of an electrochemically active initiator. Hydrogel patterns can be written by employing a small insulated counter electrode. The investigations show that the "pen" actually is a small oxygen bubble between the counter electrode and the sample surface. The...
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ژورنال
عنوان ژورنال: Macromolecular Rapid Communications
سال: 2007
ISSN: 1022-1336,1521-3927
DOI: 10.1002/marc.200600572