Reevaluation of Tetrahydrophthalic Anhydride as an End Cap for Improved Oxidation Resistance in Addition Polyimides

Macromolecules

Volumn 37, Issue 4, 2004, Pages 1289-1296

  Meador, Mary Ann B ^a   Frimer, Aryeh A ^b   Johnston, J Christopher ^a  

^a NASA GLENN RESEARCH CENTER   (United States)

^b BAR ILAN UNIVERSITY   (Israel)

Author keywords

[No Author keywords available]

Indexed keywords

DIELS-ALDER REACTIONS; THERMOOXIDATIVE STABILITY;

ADDITION REACTIONS; AROMATIZATION; BUTADIENE; CROSSLINKING; DEGRADATION; DIFFERENTIAL SCANNING CALORIMETRY; HYDRIDES; MOLECULAR STRUCTURE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; OLIGOMERS; POLYCONDENSATION; SYNTHESIS (CHEMICAL); THERMOANALYSIS; THERMODYNAMIC STABILITY; THERMOOXIDATION;

POLYIMIDES;

EID: 1642308866     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma0353078     Document Type: Article

References (30)

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20. We thank Dr. Hugo E. Gottlieb (Magnetic Resonance Laboratory, Bar Ilan University) for this suggestion.
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30. 14 to be 80°C at 8 mm. This corresponds (nomograph) to a boiling point of ca. 220°C at 760 mm. The boiling point of commercial (Aldrich) trans,trans-1,4-phenyl-1,3-butadiene (8f) is 350°C. The TGA of the 2:1 mixture of 8f and MDA heated to 204°C shows a Td at 239°C (corresponding to imidization) and 352°C (corresponding to retro-Diels-Alder), with onset in both cases ca. 20°C earlier. DSC confirms these transitions.