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Kim BH, Kim DH, Cho HS. Monomer Determination of Polyamic Acids by Hydrolysis and Methanolysis, and Gas Chromatography-Mass Spectrometry. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Byoung-Hyoun Kim
- Analytical Science, LG Chem. Research Park; LG Chem. Ltd.; Daejeon 305-738 South Korea
| | - Dong Hyun Kim
- Analytical Science, LG Chem. Research Park; LG Chem. Ltd.; Daejeon 305-738 South Korea
| | - Hye Sung Cho
- Analytical Science, LG Chem. Research Park; LG Chem. Ltd.; Daejeon 305-738 South Korea
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Zhang Y, Zhang G, Sun X, He Z, Rajaratnam M. Properties and Microstructure Study of Polyimide Foam Plastic. CELLULAR POLYMERS 2010. [DOI: 10.1177/026248931002900401] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Five kinds of polyimide (PI) foams were prepared from dianhydride and diamine by esterification process. The microstructure of foam was characterized by SEM and visualization methods, and many properties of material were measured, including heat resistance, fire resistance, compressive strength, heat insulation and acoustic absorption. It was shown that the cell size of foam was from 1 to 1.5 mm. The cell edge of PIBM and PIBO foam was obscure, and the cell wall was thinner than the PIBD, PIOD and PIBO-DM foam with thicker cell edge and poor cell size homogeneity. Five types of PI foams presented the trait of flexible foam plastics. All of them possess high decompose temperature, and their limiting oxygen index surpassed 40 percent, and thermal diffusion coefficients were less than 0.030 W/m·°C. In addition, PIBO, PIOD, and PIBO-DM foam had excellent acoustic absorption.
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Affiliation(s)
- Y.Z. Zhang
- Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - G.C. Zhang
- Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - X.F. Sun
- Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Z. He
- Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - M. Rajaratnam
- Division of Pharmaceutical Chemistry, Faculty of Pharmacy, FIN-00014, University of Helsinki, Finland
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