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Preparation method of hydroxyl-terminated styrene resin

A polystyrene resin and hydroxyl-terminated technology, which is applied in the field of preparation of hydroxyl-terminated polystyrene resin, can solve the problems of complex methods, high cost, fear of oxygen, etc., and achieve simple reaction conditions, fast reaction rate, and controllable products Effect

Inactive Publication Date: 2015-04-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because anionic polymerization can obtain resins with controllable molecular weight and narrow molecular weight distribution, it is favored by some researchers. However, anionic polymerization is afraid of water and oxygen, and the requirements for the synthesis environment are extremely strict, so the method is complicated and the cost is high.

Method used

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  • Preparation method of hydroxyl-terminated styrene resin
  • Preparation method of hydroxyl-terminated styrene resin
  • Preparation method of hydroxyl-terminated styrene resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 5 grams of UV photoinitiator 2959 and 100 grams of refined styrene monomer into the UV reaction vessel, fill it with nitrogen at room temperature, seal it, place it in a UV oven, and adjust the UV light intensity to 150mW / cm 2 , after 20 seconds of light irradiation to stop the reaction, the unreacted styrene monomer was distilled off at 0.133kPa under reduced pressure at 70°C to obtain a hydroxyl-terminated polystyrene resin. Molecular weight as attached figure 1 .

Embodiment 2

[0020] Add 15 grams of UV photoinitiator 2959 and 100 grams of refined styrene monomer to the UV reaction vessel, fill it with nitrogen at room temperature, seal it, place it in a UV oven, and adjust the UV light intensity to 100mW / cm 2 , after 40 seconds of light to stop the reaction, the unreacted styrene monomer was distilled off at 0.133kPa under reduced pressure and 70°C to obtain a hydroxyl-terminated polystyrene resin with molecular weight as attached figure 2 .

Embodiment 3

[0022] Add 30 grams of UV photoinitiator 2959 and 100 grams of refined styrene monomer to the UV reaction vessel, fill it with nitrogen at room temperature, seal it, place it in a UV oven, and adjust the UV light intensity to 50mW / cm 2 , after 80 seconds of light to stop the reaction, the unreacted styrene monomer was distilled off at 0.133kPa under reduced pressure and 70°C to obtain a hydroxyl-terminated polystyrene resin with molecular weight as attached image 3 .

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Abstract

A preparation method of hydroxyl-terminated styrene resin belongs to the technical field of high molecular materials. In an ultraviolet reactor, an ultraviolet initiator of 2-hydroxyl-4-(2-hydroxyethoxy)-2-methyl propiophenone (2959) and refined styrene monomers are added; nitrogen is injected; polymerization is carried out through the initiation by ultraviolet light irradiation at room temperature, and unreacted styrene monomers are removed at a reduced pressure; and thus the hydroxyl-terminated styrene resin is obtained. The preparation method of the invention is easily available in raw materials, low in cost, simple, practical, and suitable for large-scale industrial production, and provides a new approach for the preparation of polystyrene resin with reactivity.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of hydroxyl-terminated polystyrene resin. Background technique [0002] The hydroxyl groups in hydroxyl-terminated polystyrene have good reactivity, and thermoplastic polyurethane-polystyrene block copolymers can be prepared through gradual polymerization, thereby improving the water resistance, mechanical strength and processing properties of thermoplastic polyurethane, and are widely used in plastics , metal, textile bonding. [0003] Generally, hydroxyl-terminated polystyrene can be prepared by free radical polymerization, generally by using an azo initiator with a hydroxyl functional group to initiate the polymerization of styrene monomer. Most of them are prepared by anionic polymerization. First, sodium naphthalene or lithium naphthalene initiator is used to initiate the polymerization of styrene monomer, and then it is obtained b...

Claims

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Application Information

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IPC IPC(8): C08F112/08C08F2/50C08K5/07
Inventor 张军营刘鑫程珏
Owner BEIJING UNIV OF CHEM TECH
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