Unlock instant, AI-driven research and patent intelligence for your innovation.

Combined near-infrared light-induced iodine-regulated rdrp and ultraviolet light-induced ring-opening polymerization "one-pot" synthesis of graft copolymers

A technology of ring-opening polymerization and near-infrared light, which is applied in the field of polymer preparation, can solve problems such as the decrease of reaction concentration and the influence of polymerization efficiency

Active Publication Date: 2022-03-11
SUZHOU UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research is focused on using special initiators containing bifunctional initiating groups to achieve orderly controlled polymerization under different stimulus conditions. This method can only obtain block copolymers, and there is another layer of factors in it. , because the components required for multiple reaction types are fed in one container at the same time, when a single reaction is carried out, the reaction concentration drops sharply, which greatly affects the polymerization efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Combined near-infrared light-induced iodine-regulated rdrp and ultraviolet light-induced ring-opening polymerization "one-pot" synthesis of graft copolymers
  • Combined near-infrared light-induced iodine-regulated rdrp and ultraviolet light-induced ring-opening polymerization "one-pot" synthesis of graft copolymers
  • Combined near-infrared light-induced iodine-regulated rdrp and ultraviolet light-induced ring-opening polymerization "one-pot" synthesis of graft copolymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1 One-time feeding "one pot method" polymerization

[0075] Molar ratio [HEMA] 0 / [MMA] 0 / [EIPA] 0 / [δ-VL] 0 / [DMI] 0 / [TSPF 6 ] 0 Take the aggregation process of =20 / 80 / 1 / 100 / 2 / 0.1 as an example, the steps are as follows:

[0076] HEMA (67.0μL, 0.57mmol), MMA (0.24mL, 2.30mmol), EIPA (5.3μL, 0.0287mmol), δ-VL (0.26mL, 2.87mmol), DMI (6.2μL, 0.0574mmol), TSPF 6 (29.6μL, 0.0317mmol) and 0.50mL DMSO solvent, placed in a dry 5mL ampoule equipped with a magnetic stir bar. The ampoule was flame-sealed by going through three cycles of freeze-pump-thaw-fill on a double-column tube with an argon (Ar) atmosphere for protection. The reaction vessel was transferred to a magnetic-driven stirring device, and a water-cooled circulation device and a near-infrared LED light source with a center wavelength of 730 nm were placed on the magnetic stirrer. Turn on the 730nm LED light source switch to carry out the polymerization experiment, and control the reaction temp...

Embodiment 2

[0088] Embodiment 2 continuous feeding "one pot method" polymerization

[0089] In the preparation of graft copolymers by one-step "one-pot" polymerization, it is necessary to feed a larger proportion of δ-VL monomers to obtain more and longer branched graft copolymers, but the cyclic monomers The concentration is much higher than the concentration of free radical polymerization components, which is unfavorable to the free radical polymerization process, resulting in low synthesis efficiency of the graft copolymer main chain. Therefore, graft copolymers can be synthesized by a "one-pot" polymerization method with two consecutive additions. Specifically, when feeding for the first time, only feed low-concentration δ-VL monomers, or only add free radical polymerization components, so as to avoid excessive addition of cyclic monomers at one time, which is harmful to free radical polymerization. cause adverse effects. After the near-infrared LED light is irradiated for a predete...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
wavelengthaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for synthesizing a graft copolymer by combining near-infrared light-induced iodine regulation RDRP and ultraviolet light-induced ring-opening polymerization "one-pot method": the free radical polymerization component is first subjected to near-infrared light-induced free radical polymerization reaction, After the polymerization is complete, the ring-opening polymerization component is used to induce the ring-opening polymerization reaction by ultraviolet light, and the graft polymer is obtained after the reaction is complete; the above reactions are all carried out in the same reaction vessel; wherein, the free radical polymerization component includes the free radical polymerization unit body, iodoalkane initiator and carbonyl-containing solvent; free radical polymerization monomers include hydroxyl-containing methacrylate monomers; ring-opening polymerization components include ring monomers and photoacid generators. The present invention combines the RDRP system regulated by near-infrared light-induced iodine with simple components and the "active" ring-opening polymerization system, uses two light sources with different wavelengths in sequence, and uses the "one-pot" polymerization reaction method to prepare carbon-carbon-based A graft copolymer composed of chains and polyester branches.

Description

technical field [0001] The invention relates to the technical field of polymer preparation, in particular to a method for synthesizing a graft copolymer in a "one-pot method" combining near-infrared light-induced iodine regulation of RDRP and ultraviolet light-induced ring-opening polymerization. Background technique [0002] The "one-pot" synthetic method is a concept in organic chemistry that has become an important method for rapid synthesis and polymer modification. In a "one-pot" reaction, "living" polymerization techniques with different mechanisms are combined to prepare polymers, avoiding intermediate synthesis and purification steps, for example, ring-opening polymerization (ROP) has been combined with reversible- A combination of deactivated radical polymerization (RDRP) methods, such as nitroxide-stabilized radical polymerization, reversible addition-fragmentation chain transfer (RAFT) polymerization, and atom transfer radical polymerization (ATRP), has successful...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/02C08F220/20C08F220/14
CPCC08F283/02C08F220/20C08F220/14
Inventor 程振平田春张丽芬赵海涛朱秀林
Owner SUZHOU UNIV