AI Article Synopsis
- A new type of colorless polyimide (CPI) was created using a special dianhydride and another compound, resulting in materials with excellent thermal and mechanical properties.
- The unique structure of the new dianhydride (3FPODA) led to improved glass transition temperatures, lower thermal expansion, and increased tensile strength and modulus compared to previous materials.
- Additionally, the active carbonyl group in 3FPODA enhances the adhesive properties of the CPIs, making it a promising candidate for high-performance applications.
Article Abstract
A new series of colorless polyimides (CPIs) with outstanding thermal properties and mechanical properties were fabricated by the copolymerization of a novel dianhydride and 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) with 2,2'-bistrifluoromethyl benzidine (TFDB). The novel dianhydride, 10-oxo-9-phenyl-9-(trifluoromethyl)-9,10-dihydroanthracene-2,3,6,7-tetraacid dianhydride (3FPODA), possessed a rigid semi-alicyclic structure, -CF and phenyl side groups, and an active carbonyl group. Benefitting from the special structure of 3FPODA, the glass transition temperatures (T) of the new CPIs improved from 330 °C to 377 °C, the coefficient of thermal expansion (CTE) decreased from 46 ppm/K to 24 ppm/K, and the tensile strength (T), tensile modulus (T), and elongation at break (E) increased from 84 MPa to 136 MPa, 3.2 GPa to 4.4 GPa, and 2.94% to 4.13% with the increasing amount of 3FPODA, respectively. Moreover, the active carbonyl group of the 3FPODA could enhance the CPI's adhesive properties. These results render the new dianhydride 3FPODA an ideal candidate monomer for the fabrication of high-performance CPIs.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9571554 | PMC |
| http://dx.doi.org/10.3390/polym14194132 | DOI Listing |
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