Journal
ACS MACRO LETTERS
Volume 10, Issue 10, Pages 1321-1325Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.1c00461
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Funding
- National Natural Science Foundation of China [22073082, 21774111]
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In this study, zwitterionic poly(4-vinylpyridine) propane-1-sulfonate (PVPS) was used to construct high chi-low N block copolymers (BCPs) with different neutral polymers, forming lamellar structures with sub-5 nm microdomains. The electrostatic interaction in polyzwitterion led to relatively high Flory-Huggins parameters (chi) between PVPS and most neutral polymers, facilitating efficient fabrication of BCPs. The sub-5 nm structures in PVPS-containing BCPs showed high thermal stability with minimal fluctuation in domain spacings upon heating.
In this work, we used zwitterionic poly(4-vinylpyridine) propane-1-sulfonate (PVPS) as a constituent block to construct high chi-low N block copolymers (BCPs) with different neutral polymers as the other block, including polystyrene (PS), poly(ethylene oxide) (PEO), and poly(L-lactide) (PLLA). Lamellar structures with sub-5 nm microdomains were observed in all three types of BCPs. Due to the tendency of self-aggregation induced by electrostatic interaction in polyzwitterion, the Flory-Huggins parameters (chi) between PVPS and most neutral polymers are relatively high, which provides a facile and efficient way to fabricate high chi-low N BCPs. In addition, the dimension of the sub-5 nm structures formed in PVPS-containing BCPs showed high thermal stability with a small fluctuation (+/- 0.1 nm) of domain spacings upon heating.
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