Dynamic disorder and conformer exchange in the crystalline monomer of polycarbonate
Article Abstract:
Measurements of chemical exchange events in the crystalline polycarbonate monomer 4,4'-isopropylidenediphenol (bisphenol A, BPA) via 2D 13C solid-state NMR shows slow, large-amplitude aromatic ring orientations. Experiments with multiple exchange times show that ring flips occur in all of the three unique conformers found in the crystalline unit cell of this compound, but in specific cases, two of the three unique molecules actually switch conformations.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
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Scaling aspects of the kinetics of thermally induced phase seperation in bisphenol a polycarbonate/poly(methyl methacrylate) blends
Article Abstract:
Phase seperation in blends of bisphenol A polycarbonate and poly(methyl methacrylate) is investigated on the microscopic scale by means of atomic force microscopy. The spindonal decomposition processes are strongly affected by the occurrence of chemical reactions between polycarbonate and poly(methyl methacrylate), which slows the growth rate of the dispersed phase and the surface roughening.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Influence of polycarbonate flexibility on the annealing-induced phase separation of the hole transport molecule TPD in a model charge transport composite
Article Abstract:
Investigation of the phase separation induced by annealing of films containing TDP and two different types of polycarbonates is discussed. The depression of the T(sub g) is more pronounced in the case of the PCZ polycarbonate, which is conformationally more restricted.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
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