Novel Miscible Blends Composed of Poly(Methyl Methacrylate) and 2,2-Bis(3,4-Carboxyphenyl)Hexafluoropropane Dianhydride-Based Polyimides with Optical Grade Clarityopen access
- Authors
- Im, Hyungu; Kim, Hyomi; Kim, Jooheon
- Issue Date
- Jul-2009
- Publisher
- JAPAN INST METALS
- Keywords
- miscibility; optical grade clarity; scratch resistance; phase separation; lower critical solution temperature (LCST) behavior
- Citation
- MATERIALS TRANSACTIONS, v.50, no.7, pp 1730 - 1736
- Pages
- 7
- Journal Title
- MATERIALS TRANSACTIONS
- Volume
- 50
- Number
- 7
- Start Page
- 1730
- End Page
- 1736
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/36521
- DOI
- 10.2320/matertrans.MF200916
- ISSN
- 1345-9678
1347-5320
- Abstract
- Several blends of polymers that varied concentrations of poly(methyl methacrylate) (PMMA) and polyimides based on 2,2'-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) were prepared in film form by solution casting and using various solvents. The miscibility of the blended films was correlated through a differential scanning calorimeter (DSC), Fourier transform infrared spectroscopy (FTIR), and an image analyzer. DSC thermograms revealed two glass-transition temperatures (T-g) for specimens using tetrahydrofuran (THF) as a casting solvent, indicating immiscibility; on the other hand, samples using methyl chloride (MC) and cyclohexanone showed a single T-g, indicating miscibility between the two polymers. The phase separation temperature for the miscible samples showed lower critical solution temperature type (LCST-type) behavior and reached its minimum when the content was about 70 mass% PMMA. Both the transmittance and haze of the miscible blended films were measured according to the American Standards Testing Method (ASTM) specification D1003. The transmittance for 6FDA-6FpDA/PMMA had a value of about 85% in the visual light range. However, 6FDA-6FpDA:DABA 2 : 1/PMMA showed a low transmittance below wavelengths of 550 nm. For haze, all of the films were clear with values of less than 1%. The mechanical scratch resistance was measured by pencil test (ASTM 3363). Increasing the 6FDA-6FpDA polyimide content was found to increase the scratch resistance of the films. [doi: 10.2320/matertrans.MF200916]
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Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
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