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Thermoplastic phenolic resin synthesized by liquefied bamboo waste as well as preparation method and application of thermoplastic phenolic resin

A phenolic resin and thermoplastic technology, applied in the field of polymer synthesis, can solve problems such as the inability to apply phenolic molding compounds, limit the application range of resins, and the resin is prone to crosslinking, etc., and achieve stable product quality, increased molecular weight, and improved physical properties.

Active Publication Date: 2016-07-13
ZHEJIANG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shortcomings of the synthesis process, the resin is prone to cross-linking during the reaction process. Therefore, the resin they prepared cannot be used in the field of phenolic molding compounds due to its high viscosity, which greatly limits the application range of the resin.

Method used

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  • Thermoplastic phenolic resin synthesized by liquefied bamboo waste as well as preparation method and application of thermoplastic phenolic resin
  • Thermoplastic phenolic resin synthesized by liquefied bamboo waste as well as preparation method and application of thermoplastic phenolic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) 200g moso bamboo wastes are pulverized and crossed an 80-mesh sieve, and 2g of potassium chloride powder is added, mixed uniformly, dried at 60° C. to constant weight to obtain bamboo powder;

[0041] (2) 900g of phenol and 63g of 37% hydrochloric acid are added in the there-necked flask, stirred and heated up to 115°C, 180g of the bamboo powder obtained in step (1) is added in three batches in the there-necked flask, and the reaction is completed at 115°C for 2 hours to obtain bamboo waste liquefied matter;

[0042] (3) Add 640g of 37% formaldehyde to the above-mentioned bamboo liquefaction product, start stirring and raise the temperature to the reflux temperature, after the heat preservation reaction for about 20min, then depressurize and evacuate under the heated state to a vacuum degree of -0.085MPa for dehydration, to the system temperature Rise to 185 ° C to stop heating, and cool to obtain bamboo waste liquefied product modified thermoplastic phenolic resin,...

Embodiment 2

[0045] (1) 200g Phyllostachys praecox waste is pulverized and crossed 80 mesh sieves, 2g potassium sulfate powder is added, after mixing, dry at 70°C to constant weight to obtain bamboo powder;

[0046] (2) Add 700g phenol, 400g o-cresol and 44g98% sulfuric acid into the there-necked flask, stir and heat up to 115°C, add 110g of the bamboo powder obtained in step (1) into the there-necked flask in three batches, and finish the reaction at 120°C for 3 hours , to obtain bamboo waste liquefaction;

[0047] (3) Add 752g of 37% formaldehyde to the above-mentioned bamboo liquefaction product, start stirring and raise the temperature to the reflux temperature, keep the temperature for about 30 minutes, then depressurize and evacuate under the heating state until the vacuum degree is -0.09MPa, dehydrate to the system temperature Rise to 188 DEG C to stop heating, and cool to obtain bamboo waste liquefied product modified thermoplastic phenolic resin.

[0048] The weight-average molec...

Embodiment 3

[0050] (1) 200g of purple bamboo wastes are first pulverized and passed through an 80-mesh sieve, and 2g of potassium bisulfate powder is added, mixed uniformly, and then dried to a constant weight at 80°C to obtain bamboo powder;

[0051] (2) 900g phenol and 27g37% hydrochloric acid are added in the three-necked flask, stirred and heated up to 115°C, 63g of the bamboo powder obtained in step (1) is added in three batches in the there-necked flask, and the reaction is completed at 125°C for 4 hours to obtain liquefaction of bamboo waste thing;

[0052] (3) Add 653g of 37% formaldehyde to the above-mentioned bamboo liquefaction product, start stirring and raise the temperature to the reflux temperature, after the heat preservation reaction for about 50min, then depressurize and evacuate under the heating state to a vacuum degree of -0.095MPa for dehydration, to the system temperature Rise to 190 DEG C to stop heating, and cool to obtain bamboo waste liquefied product modified t...

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Abstract

The invention provides a thermoplastic phenolic resin synthesized by liquefied bamboo waste. The thermoplastic phenolic resin is prepared through the following steps: grinding bamboo waste, screening the grinded bamboo waste through a 80-mesh screen, adding sylvite to carry out uniform mixing, and drying at 60-80DEG C to a balance weight so as to obtain bamboo powder; adding phenol and an acid catalyst in a reaction container, carrying out warming to 115DEG C, adding the bamboo powder obtained in the step (1), carrying out reaction at 115-125DEG C for 2-4 h, and carrying out cooling to room temperature after the reaction is finished so as to obtain a bamboo waste liquefied product; adding aldehyde in the bamboo waste liquefied product obtained in the step (2), carrying out warming to achieve a backflow temperature, carrying out reaction for 20-50 min, improving the vacuum degree to -0.085-0.095 Mpa, and obtaining the required thermoplastic phenolic resin synthesized by liquefied bamboo waste when the system temperature is up to 185-109DEG C. The obtained thermoplastic phenolic resin accords with the performance requirements of phenolic resin for moulding compound, and develops a new application field of bamboo waste liquefied products.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and in particular relates to a method for synthesizing a modified thermoplastic phenolic resin, in particular to a thermoplastic phenolic resin synthesized from bamboo waste liquefaction and its preparation method and application. Background technique [0002] With the increasing shortage of ore resources, especially the limited storage of oil and natural gas resources, their production and consumption, and their increasingly serious impact on the ecological environment, polymer materials based on natural renewable resources have been vigorously developed. Among many natural renewable resources, bamboo, known as the "second forest", has gradually attracted the attention of chemical workers because of its fast growth, straightness, wide distribution, and strong adaptability. Usually, when bamboo is processed physically, its effective utilization rate is far lower than 40%, and more than ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/34C08L61/14
CPCC08G8/34C08L61/14
Inventor 向自伟沈晓音熊意陈建国田浩周大鹏孟付良沈培良李伯耿范宏
Owner ZHEJIANG UNIV