Method for preparing hyperbranched polymer by adopting consecutive click chemical reaction
A technology of hyperbranched polymer and click chemistry, which is applied in the field of synthesizing hyperbranched polymers containing thioether and alkynyl groups, can solve the problems that monomers cannot be purchased commercially, lengthy preparation time, low comprehensive yield, etc. Wide range of monomers, wide application prospects, high yield effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0014] Example 1:
[0015] Step 1), under the protection of nitrogen, 3,6-dioxa-1,8-octane dithiol (3.64 g, 20 mmol), methanol (6.4 g, 200 mmol), KOH ( 1.12 g, 20 mmol), propynyl bromide (2.41 g, 20.4 mmol), in 15 o React at C for 0.5 hours, remove the formed KBr salt precipitate by filtration, and evaporate under reduced pressure to remove methanol;
[0016] Step 2), under the protection of nitrogen, dissolve the product obtained in step 1) in 40 mL of toluene, add 2 mol% of the photosensitive free radical initiator benzoin dimethyl ether (102.5 mg), irradiate with ultraviolet light, and polymerize for 5 hours After methanol precipitation, separation, and drying, a hyperbranched polymer (number average molecular weight is 7800; weight average molecular weight is 150,000; branching degree is 0.44).
Example Embodiment
[0017] Example 2:
[0018] Step 1), under the protection of nitrogen, 3,6-dioxa-1,8-octane dithiol (3.64 g, 20 mmol), methanol (6.4 g, 200 mmol), KOH ( 1.01 g, 18 mmol), propynyl bromide (2.12 g, 18 mmol), at -20 o React at C for 5 hours, remove the formed KBr salt precipitate by filtration, and evaporate under reduced pressure to remove methanol;
[0019] Step 2), under the protection of nitrogen, dissolve the product obtained in step 1) in 40 mL of toluene, add 2 mol% of the photosensitive free radical initiator benzoin dimethyl ether (102.5 mg), irradiate with ultraviolet light, and polymerize for 5 hours After methanol precipitation, separation and drying, the hyperbranched polymer is obtained.
Example Embodiment
[0020] Example 3:
[0021] Step 1), under the protection of nitrogen, 3,6-dioxa-1,8-octane dithiol (3.64 g, 20 mmol), methanol (0.32 g, 10 mmol), KOH ( 1.23 g, 22 mmol), propynyl bromide (2.60 g, 22 mmol), in 30 o React at C for 0.5 hours, remove the formed KBr salt precipitate by filtration, and evaporate under reduced pressure to remove methanol;
[0022] Step 2), under the protection of nitrogen, dissolve the product obtained in step 1) in 40 mL of toluene, add 2 mol% of the photosensitive free radical initiator benzoin dimethyl ether (102.5 mg), irradiate with ultraviolet light, and polymerize for 5 hours After methanol precipitation, separation and drying, the hyperbranched polymer is obtained.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap