Hyperbranched Aromatic Polyesters and Their Application in Blends of Linear Polyamides

• Main Author: Fan, Zhirong
• Other Authors: Technische Universität Dresden, Fakultät Mathematik und Naturwissenschaften
• Format: Doctoral Thesis
• Language: English
• Published: Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden 2009
• Subjects: hyperbranched polyester; additive; blend; linear polyamides; hochverzweigte aromatische Polyester; Anwendung; Blends; lineare Polyamide; ddc:540; rvk:VK 8007
• Online Access: http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-24214; http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-24214; http://www.qucosa.de/fileadmin/data/qucosa/documents/2421/Dissertation%20of%20Zhirong%20Fan.pdf

In the last two decades, hyperbranched (hb) polymers have drawn much attention and obtained intensive research activities both from industry and academia. They are known to have unique and interesting properties which derive from their three dimensional structure and the large number of functional groups. These structural characteristics provide high possibilities for controlling functional group interactions and modifications of other polymers in blends and therefore, they are expected to result in novel materials with desired properties. Furthermore, the easy synthetic accessibility of hb polymers by one-pot synthesis is advantageous as well and allows easy scale-up of laboratory reactions. Having the characteristics as mentioned above, hb polymers are considered good candidates for blend components or melt processing modifiers. In fact, hb polymers have already been used as blend components or additives aiming for different effects. In many cases, reduced viscosity and formation of miscible blends were observed by modification of a linear matrix polymer with hb polymers. More information will be introduced in the following theoretical section. In this work two hb polyester systems based on AB2 and A2+B3 approaches were synthesized and studied. Their possible applications as additives in the blends of linear polyamides were investigated.