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Types of Step-Growth Polymers: Polyesters

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method

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Dynamic Surfaces-Degradable Polyester Networks that Resist Protein Adsorption.

Gaoyan Mu¹, C K Pandiyarajan², Xiuyuan Lu¹

¹Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-7905, United States.

Langmuir : the ACS Journal of Surfaces and Colloids

|July 23, 2021

Summary

This summary is machine-generated.

Novel degradable copolyesters were synthesized and crosslinked. Network structure, determined by crosslinking density, controlled degradation rates and protein adsorption, offering tunable material properties for advanced applications.

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Area of Science:

Polymer Chemistry
Materials Science
Biomaterials

Background:

Development of degradable polymers is crucial for biomedical applications.
Controlling polymer network structure influences degradation and surface properties.
Photoactive crosslinking offers precise network formation.

Purpose of the Study:

To synthesize novel degradable alternating copolyesters.
To investigate the effect of crosslinking density on network properties.
To evaluate degradation kinetics and protein adsorption behavior.

Main Methods:

Synthesis of alternating copolyesters from diglycolic anhydride (DGA) and epoxides (epoxymethoxytriethylene glycol and epoxy benzophenone).
UV-initiated photoactive crosslinking to form polymer networks.
Solvent extraction to determine gel fraction (crosslinking density).
Degradation studies in buffer solutions at varying pH.
Bovine serum albumin (BSA) adsorption measurements.

Main Results:

Degradation kinetics varied with gel fraction: lower gel fractions showed faster, first-order degradation; higher gel fractions exhibited slower, zeroth-order degradation.
Lower gel fraction networks had higher swelling ratios and better resistance to BSA adsorption via entropic shielding and rapid degradation.
Higher gel fraction networks, with increased epoxy benzophenone content, adsorbed more BSA due to hydrophobic interactions and slower degradation.

Conclusions:

Crosslinking density significantly impacts the degradation rate and protein adsorption of these novel copolyester networks.
Tunable network structures allow for control over material performance, balancing degradation and surface interactions.
These findings provide insights for designing degradable materials with tailored properties for specific applications.