Oxazoline-terminated polybutadiene compound, and preparation method and application thereof

An oxazoline-terminated polybutadiene and polybutadiene technology, applied in recycling technology, plastic recycling and other directions, can solve problems such as environmental and human health hazards, increase in waste plastics, and reduce impact strength, and achieve environmental Friendly, mild reaction conditions, simple operation effect

Active Publication Date: 2020-09-08
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the large-scale use of plastic products, short-term use has led to a substantial increase in waste plastics, causing great harm to the environment and human health
Therefore, a series of related issues related to the recycling of waste plastics have aroused heated discussions and concerns in the academic community. Most of these waste plastics are based on high-impact polystyrene (HIPS), acrylonitrile-butadiene-styrene copolymer (ABS ), polypropylene (PP), due to long-term use, the molecular chains are aging and broken, the molecular weight is reduced, and polar groups such as hydroxyl and carboxyl are oxidized, and the mechanical properties are deteriorated, especially the impact strength is reduced.

Method used

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  • Oxazoline-terminated polybutadiene compound, and preparation method and application thereof
  • Oxazoline-terminated polybutadiene compound, and preparation method and application thereof
  • Oxazoline-terminated polybutadiene compound, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Take by weighing 20.42g carboxyl-terminated polybutadiene and dissolve it in 50ml toluene to obtain carboxyl-terminated polybutadiene toluene solution;

[0037] (2) Slowly add 4.75 g of thionyl chloride into the above-mentioned carboxy-terminated polybutadiene toluene solution, and react with magnetic stirring at 40-50°C for 2-3 hours until the generation of bubbles stops;

[0038](3) A certain amount of ethanolamine was added into the system, and stirred for 2 hours by magnetic force, then 4A molecular sieve was added, and reacted for 3 hours at 120° C. to obtain an oxazoline-terminated polybutadiene compound. Wherein, the molar ratio of the added ethanolamine and carboxyl-terminated polybutadiene is 1:3.

Embodiment 2

[0040] (1) Take by weighing 20.42g carboxyl-terminated polybutadiene and dissolve it in 50ml toluene to obtain carboxyl-terminated polybutadiene toluene solution;

[0041] (2) Slowly add 4.75 g of thionyl chloride into the above-mentioned carboxy-terminated polybutadiene toluene solution, and react with magnetic stirring at 40-50°C for 2-3 hours until the generation of bubbles stops;

[0042] (3) A certain amount of ethanolamine was added to the system, and stirred for 2 hours by magnetic force, then 4A molecular sieve was added, and reacted for 5 hours at 120° C. to obtain an oxazoline-terminated polybutadiene compound. Wherein, the molar ratio of the added ethanolamine and carboxyl-terminated polybutadiene is 1:5.

Embodiment 3

[0044] (1) Take by weighing 20.42g carboxyl-terminated polybutadiene and dissolve it in 50ml toluene to obtain carboxyl-terminated polybutadiene toluene solution;

[0045] (2) Slowly add 4.75 g of thionyl chloride into the above-mentioned carboxy-terminated polybutadiene toluene solution, and react with magnetic stirring at 40-50°C for 2-3 hours until the generation of bubbles stops;

[0046] (3) A certain amount of ethanolamine was added into the system, and stirred for 2 hours by magnetic force, then 4A molecular sieve was added, and reacted for 7 hours at 120° C. to obtain an oxazoline-terminated polybutadiene compound. Wherein, the molar ratio of the added ethanolamine and carboxyl-terminated polybutadiene is 1:7.

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Abstract

The invention belongs to the field of high polymer materials, and mainly relates to an oxazoline-terminated polybutadiene compound, a preparation method thereof, and an application of the compound asa chain extender in the field of waste plastic high-valued treatment. According to the oxazoline-terminated polybutadiene compound, carboxyl-terminated polybutadiene, thionyl chloride and ethanolaminereact in an organic solvent under a certain condition to prepare the oxazoline-terminated polybutadiene compound. Carboxyl-terminated polybutadiene is an elastomer, has a toughening effect, and has good compatibility with high impact polystyrene, an acrylonitrile-butadiene-styrene copolymer and polypropylene, and oxazoline groups can react with carboxyl groups generated by aging, so that molecular chain repair and reaction compatibilization are realized. The method has the characteristics of simplicity in operation, mild reaction conditions, high target product azoline-terminated polybutadiene oxazoline content, wide application range and the like, is environment-friendly, and has wide application prospects in the field of waste plastic high-valued treatment.

Description

technical field [0001] The invention belongs to the field of polymer materials, and mainly relates to an oxazoline-terminated polybutadiene compound and a preparation method thereof, and the application of the compound as a chain extender in the field of high-value waste plastics. Background technique [0002] In the synthesis and preparation of polymers, in order to improve the mechanical properties and heat resistance of products, it is more economical and feasible to increase the molecular weight of polymers. The common method is to add chain extenders and add bifunctional small molecular compounds under blending conditions. , such as: bifunctional acid derivatives, isocyanates, acid anhydrides, oxazoline groups and epoxides, etc., these bifunctional compounds form a "bridge" between the two polymer chains by reacting with the carboxyl, hydroxyl and amine groups in the polymer ", can directly significantly increase the molecular weight, increase the viscosity of the syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/22C08L55/02C08L51/04C08L23/12C08L15/00
CPCC08C19/22C08L55/02C08L51/04C08L23/12C08L2207/20C08L2205/05C08L15/00Y02W30/62
Inventor 王文生畅贝哲辛振东常磊李洁崔煜安超蔡迪李迎春
Owner ZHONGBEI UNIV
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