|
| << previous | next >> |
Journal description
All volumes of the corresponding journal
All issues of the corresponding volume
All articles of the corresponding issues
Details for article 6 of 10 found articles
| Title: |
GRAFT COPOLYMERS AS EMULSIFIERS: Part I: Grafted Polyethyleneglycol on Polymethylmetacrylate |
| Author: |
Garti, Nissim Rossano, Anat Avni, Yair |
| Appeared in: |
Journal of dispersion science and technology |
| Paging: | Volume 14 (1993) nr. 1 pages 47-70 |
| Year: |
1993-02-01 |
| Contents: |
Polymeric surfactants, based on grafted polyethyleneglycol (PEG) with different chain lengths on polymethylmetacrylate (PMMA), have been prepared and studied. The “stabilizing moiety”, PEG, was grafted by a transesterification reaction on the -OCOCH3 groups of the “anchoring moiety” PMMA, obtaining comb type substituted PMMA. The amphiphilic polymers reduce only slightly the water/air surface tension. However, interfacial tension of certain “oil phases” such as toluene were significantly reduced. The best polymeric surfactant, reducing interfacial tension practically to zero, was PMMA of MW 130000 grafted with 6.5 wt% PEG consisting of 22 ethylene oxide (EO) units. Spontaneous emulsification was achieved with very low polymer concentration (<1.0%). Flocculation was observed in emulsion in which excess emulsifier was used or in systems containing free ungrafted PEG. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 6 of 10 found articles
| << previous | next >> |