Paul Martin Lipic
University of Minnesota
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Publication
Featured researches published by Paul Martin Lipic.
Journal of Polymer Science Part B | 1999
Paul Martin Lipic; Frank S. Bates; Mark W. Matsen
The phase behavior of intermediately segregated (χN = 45) poly(ethylene)-poly(ethylethylene) (PE–PEE) diblock copolymers and PE–PEE binary blends are characterized using transmission electron microscopy and small-angle X-ray scattering. Surprisingly, the preparation-dependent, nonequilibrium phase behavior can be overwhelming even at this degree of segregation. A pure diblock with a poly(ethylene) volume fraction of fPE = 0.46 exhibited coexisting lamellae and perforated layers when prepared using a precipitation technique, but contained only the lamellar morphology when solvent cast. This preparation dependence was more dramatic in binary diblock copolymer blends with average compositions of 〈fPE〉 = 0.44, 0.46, and 0.48. Precipitated blends exhibited a microphase separated structure that was disordered and bicontinuous; however, solvent cast samples exhibited either a cylindrical, coexisting cylindrical and lamellar, or lamellar morphology. This nonequilibrium behavior is attributed to the high degree of segregation and the proximity to the cylinder/lamellae phase boundary.
Journal of the American Chemical Society | 1998
Paul Martin Lipic; Frank S. Bates; Marc A. Hillmyer
Journal of the American Chemical Society | 1997
Marc A. Hillmyer; Paul Martin Lipic; Damian A. Hajduk; Kristoffer Almdal; Frank S. Bates
Macromolecules | 1999
Nicholas A. Melosh; Paul Martin Lipic; Frank S. Bates; Fred Wudl; Galen D. Stucky; Glenn H. Fredrickson; B. F. Chmelka
Physical Review Letters | 1997
Frank S. Bates; Wayne W. Maurer; Paul Martin Lipic; Marc A. Hillmyer; Kristoffer Almdal; Kell Mortensen; Glenn H. Fredrickson; Timothy P. Lodge
Macromolecules | 1996
Ian W. Hamley; J. Patrick A. Fairclough; Nicholas J. Terrill; Anthony J. Ryan; Paul Martin Lipic; Frank S. Bates; Elizabeth Towns-Andrews
Journal of Polymer Science Part B | 2001
Jennifer M. Dean; Paul Martin Lipic; Robert B. Grubbs; Robert F. Cook; Frank S. Bates
publisher | None
author
Archive | 1998
Frank S. Bates; Paul Martin Lipic
Archive | 1997
Paul Martin Lipic; Mark W. Matsen; Damian A. Hajduk; Zhao Xia Jin; Frank S. Bates