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Non-Tacky Fluorinated and Elastomeric STEM Networks.

Julia Cuthbert¹, Michael R Martinez¹, Mingkang Sun¹

¹Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA.

Macromolecular Rapid Communications

|February 12, 2019

Summary

This summary is machine-generated.

Researchers created soft, non-tacky polymer networks using reversible deactivation radical polymerization (RDRP). Grafting specific side chains, like poly(octafluoropentyl acrylate) (POFPA), resulted in desirable elastomeric properties and reduced tackiness.

Keywords:

atom transfer radical polymerization elastomers macromolecular gels polymer networks semi-fluorinated

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Area of Science:

Polymer Chemistry
Materials Science
Surface Science

Background:

Developing soft, elastomeric, and non-tacky polymer networks is crucial for advanced material applications.
Reversible deactivation radical polymerization (RDRP) offers precise control over polymer architecture and properties.
Tailoring polymer networks with specific side chains can significantly influence surface characteristics and mechanical behavior.

Purpose of the Study:

To synthesize soft, elastomeric, non-tacky polymer networks via RDRP.
To investigate the effect of different side chains, poly(n-butyl acrylate) (PBA) and poly(octafluoropentyl acrylate) (POFPA), on material properties.
To characterize the fluorine content and mechanical properties of the synthesized networks.

Main Methods:

Synthesis of structurally tailored and engineered macromolecular (STEM) networks using reversible addition-fragmentation chain transfer (RAFT) polymerization.
Incorporation of an atom transfer radical polymerization (ATRP) inimer into the STEM network.
Grafting of PBA and/or POFPA side chains from the network using photo-induced ATRP.
Material characterization using dynamic mechanical analysis, elemental analysis, spectroscopy, and contact angle measurements.

Main Results:

Soft polymer networks with low glass transition temperatures were successfully synthesized (E = 104–178 kPa).
The incorporation of poly(octafluoropentyl acrylate) (POFPA) side chains resulted in non-tacky surfaces.
Fluorine content and material properties were systematically investigated and correlated with side chain composition.

Conclusions:

RDRP is an effective method for creating soft, elastomeric polymer networks.
POFPA side chains are key to achieving non-tacky surfaces in these polymer networks.
The study provides insights into structure-property relationships for designing functional polymer materials.