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Small Angle Neutron Scattering Studies of Blends of Protonated Linear Polystyrene with Crosslinked Deuterated Polystyrene

Published online by Cambridge University Press:  21 February 2011

Robert M. Briber  and
Barry J. Bauer
Robert M. Briber
Affiliation:
National Institute of Standards and Technology, Polymers Division, Gaithersburg, MD 20899, USA
Barry J. Bauer
Affiliation:
National Institute of Standards and Technology, Polymers Division, Gaithersburg, MD 20899, USA
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Abstract

Small angle neutron scattering (SANS) has been used to study the scattering function and thermodynamics of blends of linear protonated polystyrene (PSH) and crosslinked deuterated polystyrene (PSD). Two series of samples were synthesized. In both cases the samples were made by dissolving the linear PSH in deuterated (d8) styrene monomer containing a small amount of divinyl benzene as a crosslinker which was then polymerized to form the PSD network around the linear PSH chains. The samples were all made at a concentration of 50/50 by weight PSD/PSH. A special effort was made to keep the samples single phase so that SANS could be used to study the thermodynamics of the system and compare with theory. This entailed working at relatively low crosslink densities (<1 mole % crosslink units). Series 1 is a set of samples with the same crosslink density varying the length of the linear chain. Series 2 is a set of samples containing the same length linear chain varying the crosslink density systematically. By extrapolating S(q) obtained from SANS to q=O the zero angle scattering, S(O), was obtained. S(O) is inversely proportional to the second derivative of the free energy with respect to composition, ∂2 (Δf/kT)/∂ø2. Assuming additivity of the free energies of mixing and elasticity, the portion of the zero angle scattering due to elasticity is calculated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 171: Symposium O – Polymer Based Molecular Composites , 1989 , 203
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

1. Shibayama, M.; et al.; Macromolecules, 18, 2179 (1985)Google Scholar
2. Jelenic, J.; et al.; Makromol. Chem., 185, 129 (1984)Google Scholar
3. Briber, R.M. and Bauer, B.J.; Macromolecules, 21, 3296 (1988)Google Scholar
4. Bates, F.S.; et al.; Macromolecules, 19, 1938 (1986)Google Scholar
5. Sperling, L.H.; Interpenetrating Polymer Networks and Related Materials, Plenum, New York, 1981 Google Scholar
6. Coleman, M.M.; et al.; Macromolecules, 20, 226 (1987)Google Scholar
7. Frisch, H.L.; et al.; Macromolecules, 13, 1016 (1980)Google Scholar
8. Flory, P.J. and Rehner, J.; J. Chem. Phys.; 11, 455 (1943)Google Scholar
9. Flory, P.J.; Principles of Polymer Chemistry, Cornell University Press, Ithaca, New York, 1953 Google Scholar
10. Binder, K. and Frisch, H.L.; J. Chem. Phys., 81, 2126 (1984)Google Scholar
11. Bauer, B.J.; Briber, R.M.; Han, C.C.; Macromolecules, 22, 940 (1989)Google Scholar
12. James, H.; Guth, E.; J. Chem. Phys., 14, 669 (1947)Google Scholar
13. Hermans, J.J.; J. Polym. Sci., 52, 197 (1962)Google Scholar
14. Kuhn, W.; J. Polym. Sci., 1, 183 (1946)Google Scholar
15. Onuki, A.; Phys. Rev. A., 38, 2192 (1988)Google Scholar
16. Olvera de la Cruz, M.; Briber, R.M.; to be publishedGoogle Scholar
17. Landau, L.D. and Lifshitz, E.M.; Theory of Elasticity, Pergamom Press 1986 Google Scholar
18. Han, C.C.; et al.; Polymer, 29, 2002 (1988)Google Scholar
19. Bates, F.S.; Macromolecules, 18, 525 (1985)Google Scholar
20. Certain equipment, instruments or materials are indentified in this paper in order to adequately specify the experimental details. Such identification does not imply recommendation by the National Institute of Standards and Technology nor does it imply the materials are necessarily the best available for the purpose.Google Scholar
21. McKenna, G.B.; et al.; Polymer Communications, 29, 272 (1988)Google Scholar
22. Bates, F.S.; et al.; Phys. Rev. Lett., 55, 2425 (1985)Google Scholar