Determination of domain sizes in compatibilized polystyrene (ethylene-propylene rubber) blends by measurements of H-1 spin diffusion

Jack, K. S., Natansohn, A., Favis, B. D. and Cigana, P. (1998) Determination of domain sizes in compatibilized polystyrene (ethylene-propylene rubber) blends by measurements of H-1 spin diffusion. Chemistry of Materials, 10 5: 1301-1308. doi:10.1021/cm970670c


Author Jack, K. S.
Natansohn, A.
Favis, B. D.
Cigana, P.
Title Determination of domain sizes in compatibilized polystyrene (ethylene-propylene rubber) blends by measurements of H-1 spin diffusion
Formatted title
Determination of domain sizes in compatibilized polystyrene (ethylene-propylene rubber) blends by measurements of 1H spin diffusion
Journal name Chemistry of Materials   Check publisher's open access policy
ISSN 0897-4756
1520-5002
Publication date 1998-05
Sub-type Article (original research)
DOI 10.1021/cm970670c
Volume 10
Issue 5
Start page 1301
End page 1308
Total pages 8
Place of publication Washington DC, United States
Publisher American Chemical Society
Language eng
Abstract he size of domains in a series of compatibilized polystyrene-(ethylene-propylene rubber) blends were measured by solid-state NMR spin diffusion measurements. The average diameter of ethylene propylene rubber (EPR) particles in the blends was observed to decrease as the concentration of interfacial agent was increased up to ca. 15% (weight/volume of EPR) and remained constant upon further addition of interfacial agent. Comparison of the domain sizes obtained from NMR measurements with those obtained from scanning electron microscopy measurements suggests that the NMR technique can be used to confirm large-scale phase separation and investigate the trends in domain sizes in immiscible blends. It was found, however, that in these blends the spin diffusion is slow due to the large size of the domains; as a consequence the uncertainty of the size obtained from 1H spin diffusion is fairly large. It was also found that mechanical grinding of the NMR samples can produce changes in the phase structure of the blends.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Microscopy and Microanalysis Publications
 
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Created: Tue, 01 Mar 2011, 16:35:32 EST by Dr Kevin Jack on behalf of Centre for Microscopy and Microanalysis