Different unit structure of copolymers obtained by polycondensation of asymmetric monomers
โ Scribed by K. R. Papava; V. A. Vasnev; S. V. Vinogradova; G. D. Markova
- Book ID
- 101408350
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 412 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0323-7648
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โฆ Synopsis
The influence of the reactivities of the functional groups of asymmetric and symmetric monomers and of the reaction conditions on the microstructure of the formed polyesters has been investigated. A quantitative estimation is presented for the different unit structure of the polycondensation interbipolyesters obtained from asymmetric monomers characterized by two types of isomers. The microstructure depends on the sequence of introduction of the comonomer units into the reaction system.
Die Mikrostruktur van Copolymeren bei der Polykondensalion van asymmetrisciien Monomeren
Der EinfluD der Reaktivitaten der funktionellen Gruppen von asymmetrischen und symmetrischen Monomeren sowie der Reaktionsbedingungen auf die Mikrostruktur der gebildeten Polyester wurde untersucht. Eine quantitative Ab- schl tzung der Struktur unterschiedlicher Einheiten von durch Polykondensation asymmetrischer Monomere erhaltenen Interbipolyestern wird vorgestellt. Die Mikrostruktur der Copolymere hangt von der Reihenfolge der Einfuhrung der Comonomere in das Reaktionssystem ab.
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## Abstract Four ethyleneโ 1 โbutene copolymers of about the same comonomer content but obtained with different supported ZieglerโNatta catalyst systems have been studied. The effects of the catalyst and the crystallization conditions on the morphological structure have been analyzed. These two fac