1986
DOI: 10.1002/actp.1986.010370507
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Die chemische und morphologische Struktur von durch thermische Festkörperpolykondensation synthetisierten Polyheteroarylenen

Abstract: Die lösungsmittelfreie Synthese von Polybenzimidazolen und Polyphenylchinoxalinen bei Temperaturen unterhalb des Schmelzpunktes der Monomere wird untersucht. Die Herausbildung der Morphologie der Polymerphase bei der als Gas‐Festkörper‐Reaktion ablaufenden Polykondensation wurde elektronenmikroskopisch verfolgt. Die Gesetzmäßigkeiten der thermischen Nachkondensation dieser Polymere bei Temperaturen oberhalb der Erweichungstemperatur wurden untersucht.

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“…For example, O, CH 2 O, SO 2 , and CMe 2 units have been used for this purpose. 15 Other approaches to modify the properties of PBIs are to make PBI copolymers, 16 to make mixed polymers such as PBI-polyimides 17 or PBI-polyamides, 18 or to blend them with other polymers. 19 As co-monomers for PBI synthesis, the aromatic bis(o-diamines) are also expensive and difficult to purify.…”
Section: Introductionmentioning
confidence: 99%
“…For example, O, CH 2 O, SO 2 , and CMe 2 units have been used for this purpose. 15 Other approaches to modify the properties of PBIs are to make PBI copolymers, 16 to make mixed polymers such as PBI-polyimides 17 or PBI-polyamides, 18 or to blend them with other polymers. 19 As co-monomers for PBI synthesis, the aromatic bis(o-diamines) are also expensive and difficult to purify.…”
Section: Introductionmentioning
confidence: 99%
“…For example, O, CH 2 O, SO 2 , and CMe 2 units have been used for this purpose . Other approaches to modify the properties of PBIs are to make PBI copolymers, to make mixed polymers such as PBI−polyimides or PBI-polyamides, or to blend them with other polymers such as polyimides . The PBI's precursors as aromatic bis( o -diamine)s are also expensive and difficult to purify.…”
Section: Introductionmentioning
confidence: 99%