Controllable growth of interpenetrating or random copolymer networks

Chatterjee, Rayan; Biswas, Santidan; Yashin, Victor V.; Aizenberg, Michael; Aizenberg, Joanna; Balazs, Anna C.

doi:10.1039/d1sm00611h

Controllable growth of interpenetrating or random copolymer networks

Journal Article · Fri Jul 09 00:00:00 EDT 2021 · Soft Matter

DOI:https://doi.org/10.1039/d1sm00611h· OSTI ID:1850904

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Univ. of Pittsburgh, PA (United States); OSTI
Univ. of Pittsburgh, PA (United States)
Harvard Univ., Cambridge, MA (United States)

Interpenetrating and random copolymer networks are vital in a number of industrial applications, including the fabrication of automotive parts, damping materials, and tissue engineering scaffolds. We develop a theoretical model for a process that enables the controlled growth of interpenetrating network (IPNs), or a random copolymer network (RCN) of specified size and mechanical properties. In this process, a primary gel “seed” is immersed into a solution containing the secondary monomer and crosslinkers. After the latter species are absorbed into the primary network, the absorbed monomers are polymerized to form the secondary polymer chains, which then can undergo further crosslinking to form an IPN, or undergo inter-chain exchange with the existing network to form a RCN. The swelling and elastic properties of the IPN and RCN networks can be tailored by modifying the monomer and crosslinker concentrations in the surrounding solution, or by tuning the enthalpic interactions between the primary polymer, secondary monomer and solvent through a proper choice of chemistry. This process can be used repeatedly to fabricate gels with a range of mechanical properties from stiff, rigid materials to soft, flexible networks, allowing the method to meet the materials requirements of a variety of applications.

View Accepted Manuscript (DOE)

Research Organization:: Harvard Univ., Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); US Army Research Office (ARO)

Grant/Contract Number:: SC0005247

OSTI ID:: 1850904

Alternate ID(s):: OSTI ID: 1808326

Journal Information:: Soft Matter, Journal Name: Soft Matter Journal Issue: 30 Vol. 17; ISSN SMOABF; ISSN 1744-683X

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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