The effect of degree of branching on the rheological and thermal properties of hyperbranched aliphatic polyethers

Magnusson, Heléne; Malmström, Eva; Hult, Anders; Johansson, Mats

doi:10.1016/s0032-3861(01)00620-6

Cited by 100 publications

(97 citation statements)

References 22 publications

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“…More interestingly, at the shear rate (frequency) of 10 s K1 , the low molecular weight HBPs had higher flow activation energy (around 140 kJ/mol) than higher molecular weight HBPs (around 100 kJ/mol). A similar observation was made when Magnusson et al [6] studied the influence of DOB on the rheology of hyperbranched aliphatic polyesters: they found that the melt viscosity (dynamic, 6.28 rad/s) decreased as DOB increased. In addition, in the case of low DOB, a rubbery plateau was obvious, characteristic of the entanglement between the polymer chains.…”

Section: Introductionsupporting

confidence: 74%

Modification of bisphenol-A based bismaleimide resin (BPA-BMI) with an allyl-terminated hyperbranched polyimide (AT-PAEKI)

Qin

Mather

Baek

et al. 2006

Polymer

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Section: Introductionsupporting

confidence: 74%

Modification of bisphenol-A based bismaleimide resin (BPA-BMI) with an allyl-terminated hyperbranched polyimide (AT-PAEKI)

Qin

Mather

Baek

et al. 2006

Polymer

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“…Johansson and coworkers 103 investigated a series of hyperbranched PEHO samples, comparing the rheological curves of complex dynamic viscosity versus temperature for different DBs (Fig. 18).…”

Section: Mechanical and Rheological Propertiesmentioning

confidence: 99%

Hyperbranched aliphatic polyether polyols

Schömer

Schüll

Frey

2012

J. Polym. Sci. A Polym. Chem.

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Hyperbranched polymers, dendritic macromolecules with branch-on-branch structures, have become an important polymer class since the early 1990s. They combine several advantages of the perfectly branched dendrimers with easy accessibility, typically in a one-step synthesis. Hyperbranched polyethers are a particularly interesting class of chemically stable and often biocompatible materials. Multifunctional hyperbranched polyethers with controllable molar mass and comparably low polydispersities can been prepared using hydroxyl-functional epoxides or oxetanes for polymerization via anionic and cationic polymerization mechanisms. Here, we review the progress in the preparation, characterization, and application of these uniquely versatile aliphatic polyether polyols. Their unusual mechanical, thermal, and solution properties render them useful for a variety of applications, for example, as building blocks for various complex macromolecular architectures or in biomedical applications.

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“…Hyperbranched polymers are known to have a much lower viscosity in solution and in the molten state than their linear counterparts. The thermal properties of this kind of materials are also significantly affected by the degree of branching [42].…”

Section: Experimental Measurement Of the Mean Square Radius Of Gyratimentioning

confidence: 99%

Prediction of mean square radius of gyration of tree-like polymers by a general kinetic approach

Costa

Dias

2007

Polymer

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This paper describes a kinetic method to predict the z-average molecular mean square radius of gyration of tree-like polymers formed by irreversible reactions, assuming Gaussian chains. It is based on the population balance equations for the two-sided molecular distributions of pendant chains associated with every chemically distinguishable kind of bonds. An automated method for the solution of those equations is valid both before as well as after gelation for complex kinetic schemes. Examples of its use are presented with polycondensation systems leading to hyperbranched polymers, the anionic polymerization of mono-and divinyl monomers and a radical polymerization with terminal branching and transfer to polymer.

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The effect of degree of branching on the rheological and thermal properties of hyperbranched aliphatic polyethers

Cited by 100 publications

References 22 publications

Modification of bisphenol-A based bismaleimide resin (BPA-BMI) with an allyl-terminated hyperbranched polyimide (AT-PAEKI)

Modification of bisphenol-A based bismaleimide resin (BPA-BMI) with an allyl-terminated hyperbranched polyimide (AT-PAEKI)

Hyperbranched aliphatic polyether polyols

Prediction of mean square radius of gyration of tree-like polymers by a general kinetic approach

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