Interaction parameters for blends containing polycarbonates: 1. Tetramethyl bisphenoI-A polyca rbonate / polystyrene
- Authors
- KIM, CK; PAUL, DR
- Issue Date
- 1992
- Publisher
- ELSEVIER SCI LTD
- Keywords
- BLENDS; TETRAMETHYL POLYCARBONATE; POLYSTYRENE; LCST; EQUATION OF STATE
- Citation
- POLYMER, v.33, no.8, pp 1630 - 1639
- Pages
- 10
- Journal Title
- POLYMER
- Volume
- 33
- Number
- 8
- Start Page
- 1630
- End Page
- 1639
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/57545
- DOI
- 10.1016/0032-3861(92)91059-B
- ISSN
- 0032-3861
1873-2291
- Abstract
- The interaction parameters for polystyrene and tetramethyl bisphenol-A polycarbonate blends were evaluated by fitting experimental PVT behaviour and a lower critical solution temperature (LCST)-type phase boundary to the lattice fluid theory of Sanchez and Lacombe. The phase boundaries of these blends were obtained by using a differential scanning calorimetry (d.s.c.) method, and were compared with those obtained by light transmission and visual methods. The characteristic properties for these polymers were determined by the non-linear least-squares fitting of specific volume data as a function of temperature and pressure to the equation of state. The net bare interaction parameters from the Sanchez-Lacombe theory, DELTA-P*, calculated at several compositions yielded negative values (DELTA-P* = -0.17 +/- 0.01 cal cm-3) and did not depend on composition. Flory-Huggins type interaction parameters reported in the literature for this system determined by a small-angle neutron scattering technique compare favourably with the results of this study except in terms of composition dependence.
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