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Determination of Microphase Structure and Scale of Mixing in Poly(ε-caprolactone) (PCL)/Poly(vinyl chloride) (PVC) Blend by High-Resolution Solid-State -NMR Spectroscopy with Magic Angle Spinning and Cross Polarization

Cited 12 time in Web of Science Cited 13 time in Scopus
Authors
Kwak, Seung-Yeop
Issue Date
1994
Publisher
John Wiley & Sons
Citation
J. Appl. Polym. Sci., 53, 1823
Abstract
High-resolution solid-state, pulsed Fourier-transform (FT) 13C-nuclear magnetic resonance
(NMR) spectroscopy with magic angle spinning (MAS) and cross polarization (CP) was
applied to a mechanical blend of poly-c-caprolactone (PCL) and poly(viny1 chloride) (PVC)
with 50/50 weight ratio (% ) whose composition results in very complex morphology and
phase structure in the solid state. Proton spin-lattice relaxation times, TI ('H) and Tip( 'H) ,
were used as a probe to determine the microphase structure, the degree of homogeneity in
terms of the domain size, and the state of mixing of the blend. In particular, T1,('H ) was
shown to be able to distinguish the separated domains at a level of a few nanometers; the
scale of mixing was evaluated from the approximation based on spin-diffusion phenomenon
to be - 4.7 nm below which two polymers were partially mixed and above which they were
homogeneously mixed. Treatment of the Tip( 'H) data with two exponential decay functions
resulted in a resolution of individual TI@'H( ) into rigid and mobile components, from which
more detailed information on the phase structure and state of mixing were obtained
ISSN
0021-8995
Language
English
URI
http://hdl.handle.net/10371/20979
DOI
https://doi.org/10.1002/app.1994.070531312
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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