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Polyvinyl alcohol composition and preparation method and use thereof
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A technology of polyvinyl alcohol and its composition, which is applied in the field of polyvinyl alcohol composition and its preparation, can solve the problems of difficult thermoplastic processing, poor processability, and restrictions on the application of polyvinyl alcohol, so as to facilitate melt processing, lower the melting point, and be processable good sex effect
Active Publication Date: 2018-06-29
SIBIKANG XIAMEN NEW MATERIALS CO LTD
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[0004] There are a large number of hydroxyl groups in the polyvinyl alcohol molecule, and the hydrogen chain formed by it makes polyvinyl alcohol have a better melting temperature, and the melting temperature is close to the decomposition temperature of polyvinyl alcohol, the processability is poor, and it is difficult to thermoplastically process, which limits the polyvinyl alcohol. Application of Vinyl Alcohol
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Embodiment 1
[0025] Example 1: A polyvinyl alcohol composition, each component in the raw material is shown in Table 1, wherein the acid is an aliphatic carboxylic acid, the degree of polymerization of polyvinyl alcohol is 7000, and the degree of alcoholysis is 99%.
[0026] The preparation method of the polyvinyl alcohol composition is as follows. In step 1, polyvinyl alcohol, glycerin, calcium chloride, and acid are mixed, extruded with an extruder, and pelletized with a pelletizer to obtain an acidic polyvinyl alcohol material, wherein The extruder is a twin-screw extruder with a ratio of length to diameter of 40-60:1, and the temperature inside the extruder is 160-220 degrees Celsius.
[0027] Step 2: After mixing glutaraldehyde and the acidic polyvinyl alcohol material obtained in Step 1, extrude with an extruder, and set the temperature in the extruder at 160-220 degrees Celsius to obtain the intermediate material of the polyvinyl alcohol composition.
[0028] Step 3, after cooling t...
Embodiment 2
[0030] Embodiment 2: A polyvinyl alcohol composition, each component in the raw material is as shown in Table 1, wherein the acid is pyrophosphoric acid, the degree of polymerization of polyvinyl alcohol is 6000, and the degree of alcoholysis is 80%.
[0031]The preparation method of the polyvinyl alcohol composition is as follows, step 1, after mixing polyvinyl alcohol, urea, glycerin, calcium chloride and acid, extruding with an extruder, cutting into pellets with a pelletizer, to obtain acidic polyvinyl alcohol material , wherein the extruder is a twin-screw extruder, the aspect ratio is 40-60:1, and the temperature in the extruder is 150-180 degrees Celsius.
[0032] Step 2: After mixing glutaraldehyde and the acidic polyvinyl alcohol material obtained in Step 1, extrude with an extruder, and set the temperature in the extruder to 150-180 degrees Celsius to obtain the intermediate material of the polyvinyl alcohol composition.
[0033] Step 3: After cooling the polyvinyl a...
Embodiment 3
[0035] Embodiment 3: A polyvinyl alcohol composition, the difference from Example 2 is that each component in the raw material of the polyvinyl alcohol composition is as shown in Table 1, the acid is pyrosulfuric acid, and the degree of polymerization of polyvinyl alcohol is 4000 , alcoholysis degree is 70%.
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Abstract
The invention discloses a polyvinyl alcohol composition and a preparation method and a use thereof, wherein raw materials of the polyvinyl alcohol composition include the following components: 60-90 parts of polyvinyl alcohol, and 0.1-3 parts of glutaraldehyde. The polyvinyl alcohol composition is prepared by mixing polyvinyl alcohol in a melting state with glutaraldehyde in an acid environment. The polyvinyl alcohol composition has the following advantages and effects: the polyvinyl alcohol composition includes polyvinyl alcohol, glutaraldehyde, acid, urea and the like, glutaraldehyde and polyvinyl alcohol undergoes a crosslinking reaction, the decomposition temperature of the polyvinyl alcohol composition is increased, at the same time, the melting point of the polyethylene composition is reduced, and the processability of the polyvinyl alcohol composition is improved; a polyvinyl alcohol medical catheter prepared by the polyvinyl alcohol composition has excellent biocompatibility and is convenient for doctors to use in clinic; in addition, the polyvinyl alcohol composition can also be used for preparing sealing gaskets, degradable flowerpots, handbags and various articles, so asto achieve the effects of low melting temperature, easy melting and processing, excellent biocompatibility and wide application scope of the polyvinyl alcohol composition.
Description
technical field [0001] The invention relates to the technical field of polymer application, in particular to a polyvinyl alcohol composition, a preparation method and application. Background technique [0002] Polyvinyl alcohol is a kind of polymer whose performance is between plastic and rubber. Polyvinyl alcohol has better adhesion, film flexibility, smoothness, oil resistance, solvent resistance protection, gas barrier properties, etc. Moreover, polyvinyl alcohol is hygienic, non-toxic, and biodegradable under certain conditions. Polyvinyl alcohol is widely used in textiles, food, medicine, construction, wood processing, papermaking, printing, agriculture and other industries. Among them, medical-grade polyvinyl alcohol is safe and non-toxic to human body, non-irritating, non-sensitizing, non-cytotoxic, and has good biocompatibility. It is one of the ideal materials for preparing medical equipment. [0003] The melting of polymers is the process in which crystalline poly...
Claims
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Application Information
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