Intra-molecular cross-linking polymer, preparation method thereof and application thereof

A technology of cross-linked polymers and polymers, applied in the direction of coating, etc., can solve the problems of a large number of raw materials, difficult to control the cross-linking polymerization reaction process, and complicated preparation methods of chemically synthesized intramolecular cross-linked polymers. The effect of viscosity, strong gamma ray penetration, and simple post-processing

Active Publication Date: 2018-06-12
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the preparation method of the existing chemically synthesized intramolecular cross-linked polymer has a complicated process, requires a large amount of raw mat...

Method used

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  • Intra-molecular cross-linking polymer, preparation method thereof and application thereof
  • Intra-molecular cross-linking polymer, preparation method thereof and application thereof
  • Intra-molecular cross-linking polymer, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Accurately weigh 20g of the pretreated PVDF powder, dissolve in 150g of NMP solvent, stir for 24 hours to obtain a homogeneous solution, pass N 2 After more than 25min, place the homogeneous solution in 60 Under the CO source, the radiation reaction was carried out at 25°C, the dose rate was 3.56kGy / h, and the absorbed dose was 64kGy.

[0042] After the irradiation reaction is completed, the obtained homogeneous solution is post-treated according to the following steps: reverse-phase precipitate the homogeneous solution in deionized water, wash the obtained white solid several times, soak it in deionized water for 24 hours, and deionize The water was poured off, and the obtained solid was vacuum-dried in a vacuum oven (50° C., vacuum degree 0.07 MPa) to constant weight to obtain a sample.

Embodiment 2

[0044] Accurately weigh 20g of the pretreated PVDF powder, dissolve in 150g of DMAC solvent, stir for 24 hours to obtain a homogeneous solution, pass N 2 After more than 25min, place the homogeneous solution in 60 Under the CO source, the radiation reaction was carried out at 25°C, the dose rate was 3.56kGy / h, and the absorbed dose was 64kGy.

[0045] After the irradiation reaction is completed, the obtained homogeneous solution is post-treated according to the following steps: reverse-phase precipitate the homogeneous solution in deionized water, wash the obtained white solid several times, soak it in deionized water for 24 hours, and deionize The water was poured off, and the obtained solid was vacuum-dried in a vacuum oven (50° C., vacuum degree 0.07 MPa) to constant weight to obtain a sample.

Embodiment 3

[0047] Accurately weigh 20g of the pretreated PVDF powder, dissolve it in 150g of DMSO solvent, stir for 24 hours to obtain a homogeneous solution, pass N 2 After more than 25min, place the homogeneous solution in 60 Under the CO source, the radiation reaction was carried out at 25°C, the dose rate was 3.56kGy / h, and the absorbed dose was 64kGy.

[0048] After the irradiation reaction is completed, the obtained homogeneous solution is post-treated according to the following steps: reverse-phase precipitate the homogeneous solution in deionized water, wash the obtained white solid several times, soak it in deionized water for 24 hours, and deionize The water was poured off, and the obtained solid was vacuum-dried in a vacuum oven (50° C., vacuum degree 0.07 MPa) to constant weight to obtain a sample.

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Abstract

The invention discloses an intra-molecular cross-linking polymer, a preparation method and application thereof. The invention provides the preparation method for the intra-molecular cross-linking polymer, and comprises the following steps: performing intra-molecular cross-linking reaction on polymer under gamma-ray irradiation in a polar organic solution, thereby obtaining the intra-molecular cross-linking polymer; a ratio of degradation radiation chemical yield of the polymer to cross-linking radiation chemical yield of the polymer is smaller than 1.00; and the polymer and the polar organic solution form an uniform-phase solution. The invention further provides the intra-molecular cross-linking polymer prepared by the preparation method, and the intra-molecular cross-linking polymer has low viscosity and great surface area characteristic, the intra-molecular cross-linking polymer can be used as an additive of paint and a binder, filler and pigments of a reinforcing material, carriersof medical and biological materials and the like, and has wide use range.

Description

technical field [0001] The invention relates to an intramolecular cross-linked polymer, a preparation method and an application thereof. Background technique [0002] Polyvinylidene fluoride (PVDF) is a functional material with excellent performance developed in the 1970s. PVDF has outstanding rigidity, hardness, and creep resistance, and has the advantages of small relative density, low melting point, and good melt fluidity. Calculated according to the price per unit volume of polymer, PVDF is used in all fluorine-containing polymers. The cheapest of all. So far, PVDF is the fluoropolymer whose industrial output is second only to polytetrafluoroethylene (PTFE). At the same time, PVDF is also a common radiation-crosslinked polymer. [0003] When polymer materials are exposed to high-energy ionizing radiation, including γ-rays, electron beams, X-rays, etc., various chemical and physical changes will occur through a series of reactions such as ionization and excitation. Wh...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08J3/28C09D7/65C08L27/16
CPCC08J3/24C08J3/28C08J2327/16
Inventor 侯铮迟陆闰三杨海军梁坤坤杨宁
Owner SHANGHAI UNIV
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