1984
DOI: 10.1002/pol.1984.170221151
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Polyimides from dianhydrides and bis(p‐aminophenyl) alkane diamines. I

Abstract: SynopsisPolyimides were synthesized from pyromellitic dianhydride (PMDA), 3,3',4,4'-benzophenone tetracarboxylic dianhydride (BTDA), and three different diamines with the following general structure: R where R is ethyl, propyl, or isobutyl. The poly(amic acids) obtained had inherent viscosities ranging from 0.30 to 0.93 and were thermally/chemically converted to polyimides. The thermal stability of the polyimides was evaluated by using dynamic thermogravimetric analysis in air. Physical and thermal properties … Show more

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Cited by 49 publications
(21 citation statements)
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“…A variety of structural modifications to the polyimide backbone, such as bulky substituents, 5-7 noncoplanar biphenylene moieties, [8][9][10][11][12] and flexible [13][14][15][16][17] and kinked 18,19 units, can be employed to modify the polymer properties, * To whom correspondence should be addressed. either by lowering the interchain interactions or by reducing the stiffness of the polymer chain.…”
Section: Introductionmentioning
confidence: 99%
“…A variety of structural modifications to the polyimide backbone, such as bulky substituents, 5-7 noncoplanar biphenylene moieties, [8][9][10][11][12] and flexible [13][14][15][16][17] and kinked 18,19 units, can be employed to modify the polymer properties, * To whom correspondence should be addressed. either by lowering the interchain interactions or by reducing the stiffness of the polymer chain.…”
Section: Introductionmentioning
confidence: 99%
“…Aromatic polyimides have applicability due to their high glass transition temperature, chemical resistance and mechanical properties [7], but wholly aromatic polyimides can not be used for many specific applications because of difficulties in processability, solubility and transparency. this, asymmetric structure and non-coplanar structure have also been found to improve solubility and processability [8][9][10][11][12]. For instance, the incorporation of flexible linkages between aromatic rings in the main chain or bulky pendent groups in the side chain has improved the solubility.…”
Section: Introductionmentioning
confidence: 99%
“…Polyimides can be used in aircraft, osmotic membranes, and microelectronics. However, the rigid structure and low concentration of hydrogen bonding in the polyimide chains, although they can impart properties such as thermooxidative stability,4–6 can also make the materials hard to process because of their poor solubility 7–10…”
Section: Introductionmentioning
confidence: 99%