Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 54, Issue 22, Pages 2388-2394Publisher
WILEY
DOI: 10.1002/polb.24227
Keywords
poly(methyl methacrylate); glass transition temperature; viscoelastic properties; lithium salt; ion-dipole interaction
Categories
Funding
- JSPS [16H04201]
- [15J07757]
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The effect of ion-dipole interaction between lithium cations and oxygen atoms in poly(methyl methacrylate) (PMMA), which leads to the great enhancement of glass transition temperature (T-g), on the linear viscoelastic properties is studied using binary blends of PMMA and lithium trifluoromethanesulfonate (LiCF3SO3). The strong interaction at low temperature leads to the high modulus in the glassy region even near T-g. The interaction becomes weak as increasing the temperature. Consequently, the rheological terminal region is clearly detected without a marked enhancement of steady-state compliance, although the zero-shear viscosity increases by the LiCF3SO3 addition. The result indicates that the crosslinking due to the ion-dipole interaction has a lifetime that decides the longest relaxation time. (C) 2016 Wiley Periodicals, Inc.
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