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Helux: A Heterofunctional Hyperbranched Poly(amido amine) Carboxylate
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Coating Technology.ORCID iD: 0000-0002-9486-5288
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Coating Technology.ORCID iD: 0000-0002-9200-8004
2019 (English)In: ACS APPLIED POLYMER MATERIALS, ISSN 2637-6105, Vol. 1, no 7, p. 1845-1853Article in journal (Refereed) Published
Abstract [en]

Herein we present the first scientific report on the commercially available Helux 33/16 - a heterofunctional poly(amido amine carboxylate) hyperbranched polymer (Native Helux). The Native Helux, built from diethyl maleate (DEM) and diaminohexane (HMDA), was characterized, in part aided by reverse engineering of a similar scaffold with the same monomers. Different purification methods resulted in higher molecular weight polymers ranging from 8.4 to 51.7 kDa (M-w), and the Helux considered the purest, having 10 mmol (primary and secondary amines)/g as well as 2-4 mmol carboxylic/g Helux. Additionally, aqueous-mediated postmodifications of Helux were achieved including Michael addition, guanylation, and ring-opening of sultone, as well as water/ethyl acetate-mediated amidation of imidazole-activated pentenoic acid. The inherent heterofunctionality of Helux, amines and carboxylic groups, was further explored by a one-component self-cross-linking approach that yielded a dendritic poly(amido amine) network with autofluorescence-exhibiting properties and a T-g of 59 degrees C. The Helux network exhibited a storage modulus (G') of 7.9 MPa at 25 degrees C and in dry state, and 0.9 MPa (G') when plasticized by 50 wt % swelling (in water) of the network. Finally, dendritic hydrogels based on Helux were produced by a spontaneous NHS-amidation reaction with difunctional 10kPEG-NHS. The mechanical properties of the hydrogels were found to be dependent on the curing temperature for the hydrogel, yielding a G' of 8 and 14.5 kPa, a stress at break of 11.5 and 22.7 kPa, and a strain-at-break of 161 and 163%, at 25 and 37 degrees C, respectively.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2019. Vol. 1, no 7, p. 1845-1853
Keywords [en]
commercial, heterofunctional, hyperbranched, polyampholyte, postfunctionalization, self-cross-linking, hydrogel
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-256273DOI: 10.1021/acsapm.9b00364ISI: 000476967100025OAI: oai:DiVA.org:kth-256273DiVA, id: diva2:1366448
Note

QC 20191029

Available from: 2019-10-29 Created: 2019-10-29 Last updated: 2019-10-29Bibliographically approved

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Ingverud, TobiasMalkoch, Michael

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