A crystallization driven thermoresponsive transition in a liquid crystalline polymer

Yu, Yuewen; Shao, Guangran; Zhang, Wangqing

doi:10.1039/d1py00996f

Cited by 2 publications

(2 citation statements)

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“…Interestingly, the liquid crystalline polymer poly(11-(4-(( E )-4-butylstyryl)phenoxy)undecyl methacrylate) is the only example of thermoresponsive polymers in pure 1,4-dioxane that we could find in literature. 140 The polymer exhibited a UCST-type phase transition at 52.3 °C at a polymer concentration of 2 wt%, which was demonstrated to be driven by the crystallization of the polymer in the solvent.…”

Section: Other Organic Solventsmentioning

confidence: 95%

“…In another report, the solution behaviour of the liquid crystalline polymer poly(11-(4-(( E )-4-butylstyryl)phenoxy)undecyl methacrylate) (PMAS) synthesised by RAFT polymerization was evaluated in both toluene and 1,2,4-triethylbenzene. 140 The polymer exhibited a UCST phase transition at 26.3 and 49.7 °C in 2 wt% polymer solutions in toluene and 1,2,4-triethylbenzene, respectively, characterized by a large hysteresis. The thermoresponsive behaviour was dependent on both the polymer concentration and molecular weight.…”

Section: Hydrocarbonsmentioning

confidence: 95%

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Thermoresponsive polymers in non-aqueous solutions

2022

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Section: Other Organic Solventsmentioning

confidence: 95%

Section: Hydrocarbonsmentioning

confidence: 95%

Thermoresponsive polymers in non-aqueous solutions

2022

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Facile Synthesis of Functional Polytrithiocarbonates from Multicomponent Tandem Polymerizations of CS₂, Thiols, and Alkyl Halides

Chen,

Hu,

Tang

2024

J. Am. Chem. Soc.

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Polytrithiocarbonates have attracted significant attention recently because of their good thermal stability, light refractivity, crystallinity, and mechanical properties; however, the exploration of their structures and functionalities has been limited by their synthetic approaches. Multicomponent polymerization featuring simple monomers, mild conditions, diversified product structures, and high efficiency could provide a powerful and versatile tool to synthesize various polytrithiocarbonates from commercially available monomers. Herein, a robust and efficient multicomponent tandem polymerization (MCTP) of CS 2 , dithiols, and alkyl halides was developed in DMF with K 2 CO 3 at room temperature in air to synthesize 12 polytrithiocarbonates with diversified and systematically tuned structures, high molecular weights (M n s up to 37900 g/mol), and high yields (up to 93%). Depending on the different polymer backbone structures, amorphous polytrithiocarbonates showed excellent breaking elongations, and crystallinic polytrithiocarbonates possessed a large process temperature window (about 200 °C) and good mechanical performance (σ B of 23.6 MPa and ε B of 858%), whose tensile strength could be dramatically enhanced to 87.5 MPa after uniaxial extension deformation. The upper critical solution temperature (UCST) in organic solvents, together with nonconventional luminescence, were observed for the crystallinic polytrithiocarbonates, even without any aromatic ring. This efficient, robust, mild, and economic MCTP of CS 2 thus opened up an avenue for the facile construction of polytrithiocarbonates with structural diversity, bringing modulable mechanical, thermal, luminescent, and thermalresponsive properties, which would greatly broaden the scope of structures and applications of sulfur-containing polymers.

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A crystallization driven thermoresponsive transition in a liquid crystalline polymer

Abstract: For a general responsive polymer exhibiting thermoresponsive transition in a solvent at the upper critical solution temperature (UCST), the interaction between polymer chains and solvent molecules and the interaction among...

Cited by 2 publications

References 62 publications

Thermoresponsive polymers in non-aqueous solutions

Thermoresponsive polymers in non-aqueous solutions

Facile Synthesis of Functional Polytrithiocarbonates from Multicomponent Tandem Polymerizations of CS₂, Thiols, and Alkyl Halides

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A crystallization driven thermoresponsive transition in a liquid crystalline polymer

Abstract: For a general responsive polymer exhibiting thermoresponsive transition in a solvent at the upper critical solution temperature (UCST), the interaction between polymer chains and solvent molecules and the interaction among...

Cited by 2 publications

References 62 publications

Thermoresponsive polymers in non-aqueous solutions

Thermoresponsive polymers in non-aqueous solutions

Facile Synthesis of Functional Polytrithiocarbonates from Multicomponent Tandem Polymerizations of CS2, Thiols, and Alkyl Halides

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Product

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Facile Synthesis of Functional Polytrithiocarbonates from Multicomponent Tandem Polymerizations of CS₂, Thiols, and Alkyl Halides