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Structure buildup in hyperbranched polymers from 2,2-bis(hydroxymethyl)propionic acid
KTH, Superseded Departments, Polymer Technology.
KTH, Superseded Departments, Polymer Technology.ORCID iD: 0000-0002-8348-2273
KTH, Superseded Departments, Polymer Technology.ORCID iD: 0000-0002-9372-0829
2000 (English)In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 33, no 8, 3099-3104 p.Article in journal (Refereed) Published
Abstract [en]

The structure buildup in hyperbranched polyesters from 2,2-bis(hydroxymethyl)propionic acid (bis-MPA) was studied experimentally. Bis-MPA and its dendritic trimer were both polymerized in bulk using acid catalyst. The fractions of terminal, dendritic, and linear repeating units were monitored by C-13 NMR during the course of reaction. Effect of slow monomer addition on the degree of branching in the final product was also studied. Hyperbranched polymers from bis-MPA with and without a core molecule were kept at the polymerization temperature in order to examine the effect of heat treatment on composition in the polymer. The fractions of the different repeating units were changing to a large extent with conversion. Slow monomer addition to a trifunctional core molecule gave a product with a degree of branching of 47%. Heat treatment of hyperbranched materials gave small changes in the fractions of the different repeating units in both materials and, eventually, gelling in the material without a core.

Place, publisher, year, edition, pages
2000. Vol. 33, no 8, 3099-3104 p.
Keyword [en]
aliphatic polyesters, macromolecules
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-19713DOI: 10.1021/ma991100wISI: 000086676700047OAI: oai:DiVA.org:kth-19713DiVA: diva2:338405
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Malmström, EvaHult, Anders

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