The study demonstrates how linker structure impacts transparency in POSS-based polymers, suggesting design strategies for better material properties.
Polymers containing polyhedral oligomeric silsesquioxane (POSS) side chains often crystallize, preventing transparent film formation. To clarify the influence of linker structure on POSS packing, herein, we synthesized two homopolymers bearing propyl methacrylate (P1) or styryl (P2) POSS monomers, as well as their copolymer (P3). P1 and P3 formed transparent films, whereas P2 produced brittle, cracked films, despite its amorphous nature. POSS crystallization was suppressed in P1–P3, in contrast with a control polymer containing a long alkyl linker. We demonstrate that linker rigidity and copolymer architecture are key parameters for designing transparent and thermally robust POSS-based hybrid polymers.
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Nagashima et al. (2026) studied this question.
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