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A kind of polyvinyl alcohol-based film with different stereo content and preparation method thereof

A polyvinyl alcohol-based film and a polyvinyl alcohol-based technology are applied in the field of polyvinyl alcohol-based films with different tactical contents and their preparation, and can solve the problem of many color spots and poor optical properties and tensile properties of the polyvinyl alcohol-based film. , uneven dyeing and other problems, to achieve uniform dyeing, slow down uneven drying, reduce color spots

Active Publication Date: 2021-07-30
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a polyvinyl alcohol film with different stereo content and its preparation method to solve the problems of poor optical properties and tensile properties of the polyvinyl alcohol film, and uneven dyeing and many stains

Method used

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  • A kind of polyvinyl alcohol-based film with different stereo content and preparation method thereof
  • A kind of polyvinyl alcohol-based film with different stereo content and preparation method thereof
  • A kind of polyvinyl alcohol-based film with different stereo content and preparation method thereof

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Embodiment 1

[0039] This embodiment discloses a preparation method of polyvinyl alcohol-based films with different stereo content, comprising the following steps:

[0040] (1) Test the molecular structure of polyvinyl alcohol-based polymers by proton nuclear magnetic spectroscopy, and calculate the ratio of the isotactic content (I) to the syndiotactic content (S) in the molecular structure, and select a polymer with I / S of 1.0 Vinyl alcohol polymers; NMR testing of polyvinyl alcohol polymers 1 H-NMR experiments, 1 All H-NMR experiments were carried out on a Bruker AV4000 nuclear magnetic resonance instrument; 1 In the H-NMR experiment, DMSO with a deuterium degree of 99.9% was used as a solvent, TMS was calibrated, the concentration of polyvinyl alcohol-based polymer was 2.5mg / 0.5ml, and the test was carried out at room temperature;

[0041] The polyvinyl alcohol polymer tested in this step uses vinyl acetate as the monomer, trifluoro tertiary alcohol as the solvent, and azobisisoheptan...

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Abstract

The application of the present invention belongs to the technical field of polyvinyl alcohol, and specifically discloses a polyvinyl alcohol film with different stereo content and a preparation method thereof. The raw material for preparing a polyvinyl alcohol film with different stereo content includes polyvinyl alcohol The polymer and plasticizer composition, in the molecular structure of the polyvinyl alcohol polymer, the ratio I / S of the isotactic content (I) to the syndiotactic content (S) is 0.6-1.5. The polyvinyl alcohol film with different stereo content prepared by using the polyethylene polymer has the following advantages: 1. The film has fewer crystal points and excellent optical properties; 2. Good swelling, uniform dyeing property and ductility, and less stains ; 3. Excellent tensile properties, not easy to break the film; 4. Good durability of the product.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl alcohol, and specifically discloses a polyvinyl alcohol film with different stereo content and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (PVA) film is an important raw material for making polarizers, a key component of liquid crystal displays (LCD), and is currently the downstream high-end application field of PVA. Display panels and their upstream glass substrates, polarizers, etc. are all new materials that are in short supply in China that the state encourages to develop. With the gradual transfer of panel products to mainland China, my country has become a country with a large demand for polarizers, and PVA optical film, as the core functional layer of polarizers, is currently completely dependent on imports. my country plans to achieve a localization rate of more than 30% for display panels and glass substrates, polarizers, and PVA optical films in the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L5/08C08K5/07C08K3/38C08J5/18
CPCC08J5/18C08J2305/08C08J2329/04C08K3/38C08K5/07
Inventor 吕惠霞秦庆伟朱灵玲李永江
Owner CHINA PETROLEUM & CHEM CORP
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