The viscosity of an unsaturated polyester

Kaštánek, Alois; Zelenka, J.; Hájek, Karel

doi:10.1002/app.1984.070290201

Cited by 4 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Changes in DMI content could further contribute to observed viscosity increases through heightened inherent friction in the polymeric liquid. 52,53 Reversal of these trends when the OD/DMI ratio reached 0.7:1.0 indicated a maximum in molecular weight and viscosity in relation to the monomer feed ratio. This was further reflected in esterification, which increased with higher diol-to-dicarboxylic acid feed ratios.…”

Section: Discussionmentioning

confidence: 96%

Toward Renewable and Functional Biomedical Polymers with Tunable Degradation Rates Based on Itaconic Acid and 1,8-Octanediol

Shou

Campbell

Lam

et al. 2021

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Biomedical polymers face rigid requirements for the biocompatibility of their monomers, the final polymeric product, and their residual reagents from their synthesis schemes. However, their preparation still heavily relies on nonrenewable resources. Itaconate (ITA) is an organic acid that is used as a platform chemical for the production of numerous value-added chemicals and serves as a valuable green chemistry alternative to petrochemical derivatives. In recent years, the multiple roles of this molecule in cell metabolism have generated great attention, particularly as a modulator of inflammation and infection. Recently, we developed a family of ITA polyesters that leverage hydrolytically driven degradation to recapitulate its biofunctionality. This renewable-based material platform warrants characterization of material properties based on synthesis conditions in order to advance their potential application. In this work, we describe the development of ITA polyesters relying on defined reaction feed ratios and reaction times. Material characterization highlighted the significant impact of changing molar feed on molecular weight, which corresponded to increased viscosity and decreased percent degradation. Using 20% excess ITA monomers in the reaction led to optimal outcomes, suggesting opportunities in future material design. Leveraging this characterization, ITA polyesters can be altered through synthesis conditions to achieve appropriate and specific biopolymer applications.

show abstract

Section: Discussionmentioning

confidence: 96%

Toward Renewable and Functional Biomedical Polymers with Tunable Degradation Rates Based on Itaconic Acid and 1,8-Octanediol

Shou

Campbell

Lam

et al. 2021

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

Estimation of the inherent friction factor per main‐chain friction unit of liquid low‐molecular‐weight unsaturated polyesters

Kaštánek¹,

Balcr²,

Bohdanecký

et al. 1986

J of Applied Polymer Sci

View full text Add to dashboard Cite

SynopsisThe temperature dependence (at 323-443 K) of the zero-shear viscosity q of about 30 nonfractionated samples of an unsaturated polyester (300 < M, < 1500) was analyzed and the parameters of the Vogel equation describing the q(T) dependence were estimated. Their dependence on the molecular weight is discussed. The inherent friction factor per mainchain friction unit, t o , has been evaluated for 15 < Z , < 70 (where Z, is the number-average number of mainchain friction units) and compared with the values available for other polymers.

show abstract

A viscometric study of dilute solutions of low-molecular-weight unsaturated polyesters

Kaštánek¹,

Bohdanecký

1985

European Polymer Journal

View full text Add to dashboard Cite

The viscosity of an unsaturated polyester

Cited by 4 publications

References 13 publications

Toward Renewable and Functional Biomedical Polymers with Tunable Degradation Rates Based on Itaconic Acid and 1,8-Octanediol

Toward Renewable and Functional Biomedical Polymers with Tunable Degradation Rates Based on Itaconic Acid and 1,8-Octanediol

Estimation of the inherent friction factor per main‐chain friction unit of liquid low‐molecular‐weight unsaturated polyesters

A viscometric study of dilute solutions of low-molecular-weight unsaturated polyesters

Contact Info

Product

Resources

About