STUDY OF THE TRANSPORT MECHANISM OF ORGANIC LIQUIDS THROUGH GLASSY POLYMERIC MEMBRANES BY VARIOUS OPTICAL METHODS
Abstract
THIS WORK IS CONCERNED WITH THE STUDY OF THE TRANSPORT MECHANISM OF LIQUID SOLVENTS OR SWELLING AGENTS IN CELLULOSE ACETATE MEMBRANES CHARACTERISED BY DEGREEOF ACETYLATION CORRESPONDING TO TWO ACETYL GROUPS PER GLUCOSE UNIT, AND ESPECIALLY WITH THE INFLUENCE OF THE DIFFERENTIAL SWELLING STRESSES WHICH ARE GENERATED DURING PENETRATION, DUE TO THE UNEVEN DISTRIBUTION OF THE PENETRANT CONCENTRATION IN THE POLYMER. THE LIQUID PENETRANTS WERE METHANOL (MA), METHYLENE CHLORIDE (MC), WATER (W), ACETONE (AC) AND 1,4 DIOXANE (DX). PENETRATION KINETICS WERE DETERMINED IN NON ORIENTED AND IN UNIAXIALLY ORIENTED (UNIAXIALLY STRETCHED) MEMBRANES, IN DIRECTIONS PARALLEL AND PERPENDICULAR TO THE MACROMOLECULAR ORIENTATION AXIS BY MICROSCOPY, AND WERE COMBINED WITH MEASUREMENTS OF THE CORRESPONDING BIREFRINGENCE AND REFRACTIVE INDEX PROFILES OF THE SWELLING POLYMER. FOR THE STUDY OF THE SORPTIVE CAPACITY OF THE PENETRANTS IN CA-2.0, WE CARRIED OUT VAPOUR SORPTION EXPERIMENTS AT 25 C. THE ...
show more
Download full text in PDF format (6.13 MB)
(Available only to registered users)
|
All items in National Archive of Phd theses are protected by copyright.
|
Usage statistics
VIEWS
Concern the unique Ph.D. Thesis' views for the period 07/2018 - 07/2023.
Source: Google Analytics.
Source: Google Analytics.
ONLINE READER
Concern the online reader's opening for the period 07/2018 - 07/2023.
Source: Google Analytics.
Source: Google Analytics.
DOWNLOADS
Concern all downloads of this Ph.D. Thesis' digital file.
Source: National Archive of Ph.D. Theses.
Source: National Archive of Ph.D. Theses.
USERS
Concern all registered users of National Archive of Ph.D. Theses who have interacted with this Ph.D. Thesis. Mostly, it concerns downloads.
Source: National Archive of Ph.D. Theses.
Source: National Archive of Ph.D. Theses.