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|Title:||Synthesis and characterization of new cardo polyamide-imides containing ether and tricyclo[5.2.1.02,6]decane groups|
|Source:||Liaw, D.-J.,Liaw, B.-Y.,Kang, E.-T. (1999). Synthesis and characterization of new cardo polyamide-imides containing ether and tricyclo[5.2.1.02,6]decane groups. Macromolecular Chemistry and Physics 200 (10) : 2402-2406. ScholarBank@NUS Repository.|
|Abstract:||A new cardo diimide-dicarboxylic acid, 8,8-bis[4-(4-trimellitimidophenoxy)phenyl]tricyclo-[5.2.1.02,6]decane (BTPTD), containing an ether linkage and a tricyclo[5.2.1.02,6]decane group was synthesized by condensation reaction of 8,8-bis[4-(4-aminophenoxy)phenyl]tricyclo[5.2.1.02,6]decane with trimellitic anhydride. A series of new cardo polyamide-imides were prepared by direct polycondensation of BTPTD with various aromatic diamines in N-methyl-2-pyrrolidinone (NMP) using triphenyl phosphite and pyridine as condensing agents. The polymers were produced with high yield and moderate to high inherent viscosities, i.e., of 0.73-1.36 dL · g-1. Nearly all polymers are readily soluble in polar aprotic solvents such as NMP, N,N-dimethylacetamide (DMAc), N,N-dimethylformamide, dimethyl sulfoxide as well as less polar solvents such as pyridine, γ-butyrolactone, and tetrahydrofuran. These polymers were solution-cast from DMAc solution into transparent, flexible, and tough films except for polymers 4a and 4b. Wide-angle X-ray measurement revealed that all polymers were amorphous. These polyamide-imides have glass transition temperatures between 250-290°C and 5% weight loss temperatures in the range of 445 to 491 and 462 to 490°C in nitrogen and air atmosphere, respectively. The polymer films have a tensile strength range of 77 to 87 MPa, an elongation at break range of 3 to 9%, and a tensile modulus range of 2.2 to 2.8 GPa. © WILEY-VCH Verlag GmbH, D-69451 Weinheim 1999.|
|Source Title:||Macromolecular Chemistry and Physics|
|Appears in Collections:||Staff Publications|
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