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- W4387392829 abstract "Abstract In this study, a nematic phase structure is incorporated into polybenzoxazine to increase its thermal conductivity. A simple route for the synthesis of a thermally conductive polybenzoxazine containing liquid crystalline (LC) structure by grafting oligomeric p ‐sulfophenylene‐terephthalamide (PSTA) is offered. Benzoxazine monomer of p HBA‐da is synthesized via Mannich reaction of p ‐hydroxy benzoic acid, p ‐formaldehyde, and dodecyl amine. After ring‐opening polymerization, the oligomer benzoxazine of OBZ─COOH is obtained. The OBZ─COOH/PSTA mixture is prepared by mixing PSTA with OBZ─COOH. Afterward, the grafted copolymer is named OBZ─PSTA copolymer. The liquid crystalline behavior of OBZ─COOH/PSTA is studied by polarized optical microscopy and small angle X‐ray scattering analysis. The results show that the OBZ─PSTA forms the LC structure during isothermal and non‐isothermal curing. The LC structure displays a floral textured nematic phase. The phase formation is induced by an amidation reaction. Due to the grafts of LC PSTA, the thermal conductivity of OBZ─PSTA is 0.296 W m −1 K −1 , which is 26% greater than OBZ─COOH. The glass transition temperature ( T g ) of OBZ─PSTA is 241 °C. The 5% ( T d5 ) and 10% weight loss temperatures ( T d10 ) of OBZ─PSTA are 346 and 362 °C, respectively." @default.
- W4387392829 created "2023-10-07" @default.
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- W4387392829 date "2023-10-05" @default.
- W4387392829 modified "2023-10-07" @default.
- W4387392829 title "Reaction‐Induced Liquid Crystalline Polybenzoxazine Bearing Aromatic Amide Side Branches" @default.
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- W4387392829 doi "https://doi.org/10.1002/smll.202306031" @default.
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