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Synthesis method of hyperbranched polymers and modification of epoxy curing product by hyperbranched polymers

A hyperbranched polymer and a series of technologies, applied in the field of organic polymers, can solve the problems of single structure and complicated synthesis steps, and achieve the effects of wide source of raw materials, simple synthesis method, and increase of glass transition temperature.

Active Publication Date: 2015-01-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the literature, there are many reports and patents on the use of hyperbranched polymers to toughen epoxy, but the synthesis steps are often cumbersome and the structure is single.

Method used

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  • Synthesis method of hyperbranched polymers and modification of epoxy curing product by hyperbranched polymers
  • Synthesis method of hyperbranched polymers and modification of epoxy curing product by hyperbranched polymers
  • Synthesis method of hyperbranched polymers and modification of epoxy curing product by hyperbranched polymers

Examples

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Embodiment example 1

[0033] With 150.0g (0.51mol) of trisphenol methane, 212.8g (1.54mol) of catalyst potassium carbonate, 4.5g of potassium iodide, 83.3g (0.39mol) of 1,4 dibromobutane, simultaneously add in the reactor and use 600mL of N,N dimethylformamide was dissolved; the system was reacted at 80°C for 4 hours; after the reaction, the precipitate was filtered and acidified with hydrochloric acid to obtain the filtrate; the filtrate was precipitated with a mixture of ethanol and water in an equal volume ratio, and dried to obtain 132.6g red solid powder, yield 71%.

Embodiment example 2

[0035] In this embodiment, in the preparation process of the polyether hyperbranched polymer whose end group is a phenolic hydroxyl group, the raw material 150.0g (0.51mol) of trisphenol methane is replaced by 64.3g (0.51mol) of poroglucinol, and other examples 1 is the same.

Embodiment example 3

[0037] In this embodiment, in the preparation process of the polyether hyperbranched polymer whose end group is a phenolic hydroxyl group, the raw material 83.3g (0.39mol) of 1,4-dibromobutane is replaced by 95.1g (0.39mol) of 1,6-dibromohexyl Alkane, others are identical with embodiment case 1.

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Abstract

The invention relates to a synthesis method of hyperbranched polymers and modification of an epoxy curing product by the hyperbranched polymers. The hyperbranched epoxy polymers are prepared by two reaction steps. In the first step, triatomic phenol and bifunctional alkyl bromides with different carbon chain lengths used as raw materials react to obtain the hyperbranched polymers of which the terminal group is phenolic hydroxyl group. The phenolic hydroxyl group is modified to obtain the polyether-type hyperbranched epoxy polymers of which the terminal group is epoxy group. The modified epoxy material is implemented by introducing different mass percents (3-20%) of hyperbranched polymers into the bisphenol A epoxy resin curing system; and the impact strength and tensile strength of the obtained material are greatly enhanced, and the glass transition temperature is increased.

Description

technical field [0001] The invention relates to a series of polyether type hyperbranched polymers used for strengthening and toughening epoxy materials and a preparation method thereof, belonging to the field of organic macromolecules. Background technique [0002] Hyperbranched polymers have become a hot topic in the field of polymer research in recent years. Compared with traditional linear molecules, hyperbranched polymers have a large number of terminal functional groups, a highly branched structure and a large number of holes in the molecule. These structures endow it with characteristics such as high solubility, low entanglement and low viscosity. In addition, hyperbranched polymers are much simpler to synthesize than dendrimers that are monodisperse (molecular weight) and have a defect-free structure, so they can be easily scaled up for large-scale production. These characteristics that hyperbranched polymers have make it have broad application prospects in many fie...

Claims

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Application Information

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IPC IPC(8): C08G65/48C08G65/40C08G59/38C08G59/50C08G59/42
Inventor 李效玉刘湍孟焱苗雪佩
Owner BEIJING UNIV OF CHEM TECH
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