Soochow University

Xiulin Zhu

Zhenping Cheng

Lifen Zhang

Jiannan Cheng

Kai Tu

Jian Zhu

Jinying Wang

Wei Zhang

Na Li

Lan Yao

Xiaofei Huang

Haihui Li

Enjie He

Huinan Jiang

Qun Gao

Shuangshuang Zhang

Zhengbiao Zhang

Nianchen Zhou

Jieai Li

Jiajia Li

Qilong Li

Xiangqiang Pan

Chunlai Ding

Chun Tian

The invention provides a fluorine-containing graft copolymer, and a preparation method and use thereof. The method includes the following steps: under a protective atmosphere, reacting a compound of Formula (I) and a compound of Formula (II) in a first organic solvent in the presence of a catalyst and a ligand at 20-30° C., to obtain the fluorine-containing graft copolymers of Formula (III) after complete reaction. The compounds of Formulas (I) and (II), and the fluorine-containing graft copolymer of Formula (III) have a structural formula shown below: and the compound of Formula (II) comprises a polyethylene glycol segment and a terminal alkynyl group, wherein a=4-8; b=6-8; n=1-20; and m=3-22. In the present invention, a graft copolymer of a main-chain-type 'semi-fluorinated' alternating copolymer is obtained for the first time by post-polymerization modification using a reactive functional group contained in the main-chain-type “semi-fluorinated” alternating copolymers.

Fluorine-containing graft copolymer, and preparation method and use thereof

The invention provides a living radical polymerization method using a zinc phthalocyanine dye as a near-infrared photocatalyst, including subjecting a free radical polymerizable monomer to a near-infrared light-controlled polymerization reaction, in the presence of a chain transfer agent, a cocatalyst and a zinc phthalocyanine dye containing a carbon-carbon double bond, in a solvent at 0-30° C. under the air atmosphere, to obtain a living radical polymerization product. The free radical polymerizable monomer is an acrylate monomer, a methacrylate monomer, an acrylamide monomer or a methacrylamide monomer; the chain transfer agent includes a thiocarbonate; and the cocatalyst includes an organic amine with or without a carbon-carbon double bond. A near-infrared light-responsive functional zinc phthalocyanine dye is used as a near-infrared photocatalyst for the polymerization reaction, and after the polymerization is completed, the polymerizable zinc phthalocyanine dye remains on the polymer chain by polymerization, thereby realizing the cyclic utilization of the near-infrared photocatalyst.

Living radical polymerization method using zinc phthalocyanine dye as near-infrared photocatalyst

The present invention provides a 'living' radical polymerization method for a vinyl monomer by near-infrared photothermal conversion. The method comprises irradiating a reactor with near-infrared light of 750-850 nm, wherein the reactor has a first chamber and a second chamber that are isolated from each other, the first chamber contains an organic solution of a near-infrared light responsive croconaine dye, and the second chamber is provided with a closed reaction flask containing a reaction solution, the reaction solution comprises a vinyl monomer, two or more of an ATRP initiator, an ATRP ligand, an ATRP catalyst, an RAFT reagent, a thermal initiator, and an additive, and an organic solvent; and the near-infrared light responsive dye converts the near-infrared light into heat energy, by which the reactor is heated to 50-100° C. to polymerize the monomer in the reaction solution, to obtain polymers with controlled molecular weights and molecular weight distributions.

'Living' radical polymerization method for vinyl monomer by near-infrared photothermal conversion

The present invention provides a fluorine-containing liquid crystal polymer of Formula (1). The present invention also discloses a fluorine-containing liquid crystal elastomer, which comprises a copolymer of a fluorine-containing liquid crystal polymer of Formula (1) with a near-infrared dye of Formula (2). The fluorine-containing liquid crystal elastomer of the present invention shrinks due to the photothermal conversion effect of the material under the irradiation of near-infrared light, and thus is widely applicable to the field of actuators. The fluorine-containing liquid crystal polymer of the present invention introduces fluorine-containing segments into the cross-linked network of the liquid crystal polymer, to improve the mechanical performance of the material, and greatly extend the service time of light-controlled actuators.

Fluorine-containing liquid crystal elastomer and preparation method and use thereof

A high-grafting density cyclic comb shaped polymer and its preparation method therefor. The method comprises the following steps: 1) synthesizing linear poly(pentafluorophenyl 4-vinylbenzoate) (l-PPF4VB); 2) performing photo-induced cyclization on the linear polymer to prepare the cyclic polymer (c-PPF4VB); 3) performing post modification on the cyclic polymer c-PPF4VBby using small molecules to prepare a functionalized cyclic polymer (c-P1); 4) then performing polymer post modification on the cyclic polymer (c-P1) by using an efficient click reaction to construct the high-grafting density cyclic comb shaped polymer (c-P1--PS); and 5) directly performing polymer post modification on the cyclic polymer c-PPF4VBby using macromolecules to construct a high-grafting density cyclic comb shaped polymer (c-PPF4VB-g-PEG), the obtained cyclic comb shaped polymer still remaining the characteristic of a narrow molecular weight distribution.

High-grafting density cyclic comb shaped polymer and preparation method therefor

The invention relates to a method for preparing a vinyl ether polymer by photo-initiated polymerization, which comprises the step of: under a protective atmosphere, performing photo-initiated polymerization on a vinyl ether monomer in the presence of an organic halogenated hydrocarbon and manganese carbonyl under irradiation of light having a wavelength of 365-550 nm at &#x2212;25&#xb0; C. to 25&#xb0; C., to obtain a vinyl ether polymer after the reaction is completed. In the method, a vinyl ether monomer is subjected to cationic polymerization in the presence of manganese carbonyl and an organic halogenated hydrocarbon under visible light, to prepare a vinyl ether polymer with controlled molecular weight and narrow molecular weight distribution.

Method for preparing vinyl ether polymer by photo-initiated polymerization

The present invention relates to a fluorine-containing alternating copolymer macromonomer and a synthesis method thereof. The synthesis method comprises steps of: subjecting a fluorine-containing alternating copolymer to a reduction reaction at 60-100&#xb0; C. in an organic solvent in the presence of a reducing agent and a first catalyst to obtain a reduction product; in the presence of a second catalyst, reacting the reduction product with a mercapto-monohydric alcohol in an organic solvent at 60-100&#xb0; C., to obtain a hydroxyl-terminated fluorine-containing alternating copolymer; and in the presence of a third catalyst, reacting the hydroxyl-terminated fluorine-containing alternating copolymer with an acrylic monomer or acryloyl chloride monomer at 0-30&#xb0; C., to obtain the fluorine-containing alternating copolymer macromonomer. In the present invention, a fluorine-containing alternating copolymer macromonomer is initially synthesized from a fluorine-containing alternating copolymer through polymer modification.

Fluorine-containing alternating copolymer macromonomer and synthesis method thereof

The invention provides a selenium-containing polyimide polymer, preparation method and use thereof. The method comprises: (1) polymerizing a selenide diamine monomer with a dianhydride monomer to give a selenium-containing polyamic acid; and (2) performing thermal imidization on the selenium-containing polyamic acid obtained in the step (1) to give a selenium-containing polyimide polymer. In the invention, selenium is introduced into polyimides for increasing refractive index to 1.7-1.82, this greatly improves the defects of low refractive index of the existing polyimide materials, thereby expanding its applications in the optics field.

Selenium-containing polyimide polymer, preparing method and use thereof

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Suzhou, China

Xiulin Zhu