Synthetic method of hyperbranched polymer and application of hyperbranched polymer in modified thermosetting resin

A technology of hyperbranched polymers and synthesis methods, applied in the field of polymer synthesis, can solve the problems of numerous side reactions, expensive raw materials, and high synthesis costs, and achieve the effects of simple equipment and devices, reduced production costs, and a wide range of applications

Inactive Publication Date: 2018-11-06
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many methods for toughening and modifying epoxy resin, they all have their disadvantages: most of the modification of inorganic particles requires the use of coupling agents to improve the compatibility of inorganic particles and resin matrix, even so, the phenomenon of particle agglomeration is still common; thermoplasticity Elastomer or thermosetting resin modification is prone to phase separation and resin viscosity increase; polymers with active end groups (such as HTBN, CTBN, etc.) improve the compatibility with the resin matrix while toughening, but , with the increase of toughening agent content, it reduces the manufacturability of the material
[0005] Although hyperbranched polymers have shown great application prospects in the field of thermosetting resins, especially epoxy resin modification, and there are many synthetic methods in patent documents, hyperbranched polymers modified thermosetting resins have not been industrialized on a large scale.
The reason is that the synthesis conditions of hyperbranched polymers are harsh, multi-step synthesis is required, some require anhydrous and oxygen-free, and t

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
  • Synthetic method of hyperbranched polymer and application of hyperbranched polymer in modified thermosetting resin
  • Synthetic method of hyperbranched polymer and application of hyperbranched polymer in modified thermosetting resin
  • Synthetic method of hyperbranched polymer and application of hyperbranched polymer in modified thermosetting resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In a four-necked flask equipped with a stirrer, a thermometer, a condenser, and a source of high-purity argon gas, add tetraethyl orthosilicate, neopentyl glycol, and a catalyst according to the stoichiometric amount, raise the temperature to 60°C and keep it warm for 1h, then lower the temperature Rapidly raised to 200°C, reacted for 3 hours, cooled to 80°C and discharged to obtain a hyperbranched polymer. The obtained hyperbranched polymer is added to the epoxy resin according to a certain proportion, heated and stirred evenly, and a measured amount of epoxy resin curing agent is added. After vacuum defoaming, it is cured according to the standard procedure, and finally the cured sample is obtained by demoulding. The cured epoxy resin increases the tensile strength by more than 20%, the bending strength by more than 30%, and the impact strength by 300% compared with the control group without hyperbranched polymer.

Embodiment 2

[0053] In a four-necked flask equipped with a stirrer, a thermometer, a condenser, and a source of high-purity argon gas, add coupling agent KH550, neopentyl glycol, and a catalyst according to stoichiometric amounts, raise the temperature to 70°C and keep it warm for 1.5h, then lower the temperature to Rapidly raised to 180°C, reacted for 3 hours, cooled to 50°C and discharged to obtain a hyperbranched polymer. The obtained hyperbranched polymer is added to the epoxy resin according to a certain proportion, heated and stirred evenly, and a measured amount of epoxy resin curing agent is added. After vacuum defoaming, it is cured according to the standard procedure, and finally the cured sample is obtained by demoulding. Compared with the control group without adding hyperbranched polymer, the tensile strength of the cured epoxy resin increased by more than 10%, the flexural strength increased by more than 25%, and the impact strength increased by 350%.

Embodiment 3

[0055] In a four-necked flask equipped with a stirrer, a thermometer, a condenser, and a source of high-purity argon gas, add coupling agent KH560, neopentyl glycol, and a catalyst according to stoichiometric amounts, raise the temperature to 60°C and keep it for 2 hours, and then rapidly lower the temperature to Raise to 190°C, react for 4 hours, cool down to 50°C and discharge to obtain a hyperbranched polymer. The obtained hyperbranched polymer is added to the cyanic acid resin according to a certain proportion, heated and stirred evenly, and cured according to the standard procedure after vacuum defoaming, and finally demoulded to obtain the cured sample. The cured epoxy resin increases the tensile strength by more than 15%, the flexural strength by more than 20%, and the impact strength by 250% compared with the control group without hyperbranched polymer.

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

No PUM Login to view more

Abstract

The invention belongs to the technical field of polymer synthesis and relates to a synthetic method of a hyperbranched polymer and application of the hyperbranched polymer in modified thermosetting resin. Particularly, the hyperbranched polymer is synthesized by adopting a 'one-pot method', and the synthetic method is simple, environment-friendly and efficient. The surface of the hyperbranched polymer contains a plurality of functional groups and can be modified according to actual needs; and by using the hyperbranched polymer as a modifying agent of the thermosetting resin, obvious viscosityreducing and toughening effects can be achieved. Compared with the existing synthetic method, the synthetic method provided by the invention has the advantages of wider application prospects, higher economic benefits, more environment protection and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and relates to a synthesis method of hyperbranched polymer and its application in modified thermosetting resin. Specifically, the "one-pot method" is used to synthesize hyperbranched polymers, and the synthesis method is simple, green and efficient. Background technique [0002] Epoxy resins are widely used in the fields of coatings, adhesives, semiconductor packaging materials, concrete modification, and high-performance composite materials because of their good processability, good mechanical properties and dimensional stability after curing. However, due to the high brittleness of epoxy resin after curing, the impact strength is poor in practical applications. In addition, because it contains a large number of polar groups after curing, its weather resistance and moisture resistance are poor. In order to make up for the above defects in the application of epoxy resin, since the 198...

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
IPC IPC(8): C08G77/26C08G77/14C08G77/16C08G77/06C08G83/00C08L63/00C08L79/08C08L83/08C08L83/06C08L83/04C08L87/00
CPCC08G77/06C08G77/14C08G77/16C08G77/26C08G83/005C08L63/00C08L79/085C08L83/08C08L83/06C08L83/04C08L87/00
Inventor 陈珂龙张桐崔溢梁璐王智勇
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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