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The effect of terminal alkyl chains on hyperbranched polyesters based on 2,2-bis(hydroxymethyl)propionic acid
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
1996 (English)In: Macromolecular Chemistry and Physics, ISSN 1022-1352, E-ISSN 1521-3935, Vol. 197, 3199-3207 p.Article in journal (Refereed) Published
Abstract [en]

A hyperbranched hydroxyfunctional polyester based on 2,2-bis(hydroxymethyl)propionic acid as AB(2)-monomer and a tetrafunctional polyol as core was end-capped with five different alkylacyl chlorides. Alkyl chain lengths ranging from three to sixteen carbons were used. Short alkyl chains (3-6 carbons) decrease the glass transition temperature from around 30 degrees C for the hydroxyterminated polyester to temperatures well below zero. With a sufficiently long alkyl chain (12-16 carbons) the polymers tend to crystallize. The polyesters with C-16-chains as terminal groups exhibit several different crystalline phases as revealed by differential scanning calorimetry. From X-ray data it was possible to suggest that the crystallization for the C-16-terminated samples occurs in a non-interpenetrating fashion for the larger sample and in an interpenetrating way for the smaller polymers.

Place, publisher, year, edition, pages
1996. Vol. 197, 3199-3207 p.
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-76087DOI: 10.1002/macp.1996.021971012OAI: oai:DiVA.org:kth-76087DiVA: diva2:490762
Note
NR 20140805Available from: 2012-02-06 Created: 2012-02-06 Last updated: 2017-12-08Bibliographically approved

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