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Low-refractive-index transparent material as well as preparation method and application thereof

A technology of transparent material and low refractive index, applied in instruments, clad optical fibers, optical components, etc., can solve the problems of complex synthesis, high optical loss, and low temperature resistance of perfluoroolefin copolymers, and achieve low refractive index, Good transparency and easy industrial preparation

Active Publication Date: 2021-02-19
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1. Higher optical loss
However, the synthesis of perfluoroalkene ether copolymer is complicated and the cost is high

Method used

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  • Low-refractive-index transparent material as well as preparation method and application thereof
  • Low-refractive-index transparent material as well as preparation method and application thereof
  • Low-refractive-index transparent material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0042] Synthesis of PDD monomer

[0043] Step (1), D456 synthesis process

[0044] Add the catalyst lithium chloride and the reaction solvent into the cyclization reactor, and replace the gas in the reactor with high-purity nitrogen; Fluoroacetone, insulation is finished to reaction, obtains D456; Its reaction equation is as follows:

[0045] Step (2), D416 synthesis procedure

[0046] Add D456 into the chlorination kettle, feed chlorine gas at a certain flow rate, close the steam valve, feed cooling water, control the temperature of the reactor to 75-85°C, and obtain D416 after chlorination is completed;

[0047] Step (3), D418 synthesis procedure

[0048] Add D416 synthesized in the chlorination process, hydrogen fluoride and catalyst antimony trifluoride into the fluorination kettle, start stirring, heat the jacket with low-pressure steam, raise the temperature to 80-90°C, and react for 3-4 hours to obtain the reaction product D418;

[0049] Step (4), PDD synthesis proc...

Embodiment 2-1

[0054] Add 2 mol of PDD monomer, 8 mol of tetrafluoroethylene (TFE), 0.08 mol of initiator diisopropyl peroxydicarbonate (that is, concentration 8‰), and fluorinated organic reaction medium trifluorotrichloroethane into the equipment for solution copolymerization, The PDD-TFE copolymer was prepared by solution copolymerization at 57°C; the molar mass ratio of PDD to tetrafluoroethylene was 20 / 80.

[0055] The PDD-TFE copolymer infrared spectrogram that embodiment 2-1 prepares is as figure 1 As shown, ~1000cm -1 for-CF 3 peaks at ~1050 and ~1150cm -1 It is a strong absorption band of C-O-C, ~1149cm -1 with 1220cm -1 for-CF 2 stretching vibration peak.

[0056] Use the perfluoroalkene ether copolymer (i.e. PDD-TFE copolymer) prepared in Example 2-1 above to prepare a transparent material:

Embodiment 3-1

[0058] After drying 48g of polymethyl methacrylate and 12g of perfluoroalkenyl ether copolymer in a vacuum oven at 80°C for 24 hours, the mass ratio of polymethyl methacrylate to perfluoroalkenyl ether copolymer is 80 / 20, After mixing and stirring at room temperature, add to the internal mixer, the temperature of the internal mixer is 230°C, the set speed is 50rpm, and the mixing time is 10min. The above kneaded samples were pressed into tablets (240° C.) by a flat vulcanizer to obtain sheets for testing light transmittance and haze.

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Abstract

The invention discloses a low-refractive-index transparent material as well as a preparation method and application thereof. Although traditional plastic optical fibers are low in cost, the traditional plastic optical fibers have the defects of high optical loss, low temperature resistance and the like, in order to overcome the defects of the traditional plastic optical fibers, perfluororesin is adopted to replace the traditional plastic optical fibers, but the perfluororesin is complex in synthesis, high in manufacturing cost and high in cost performance. Therefore, a perfluoroalkene ether copolymer and an acrylic resin polymer are subjected to melt blending, and the low-refractive-index transparent material with higher economic benefits is prepared under the conditions that the transparency is not lost and the low refractive index is kept. The preparation method has the advantages that (1) the acrylate polymer is a common high polymer and is low in price; (2) only common melting andmixing equipment is needed for preparation, and the industrial preparation is simple; and (3) the material prepared by melt blending shows good transparency and extremely low refractive index.

Description

technical field [0001] The invention relates to the field of polymer alloys, in particular to a transparent material with a low refractive index and its preparation method and application. Background technique [0002] Since the successful preparation of quartz optical fiber by Corning Corporation of the United States, optical fiber communication has become more and more popular because of its high speed, large capacity and excellent anti-interference performance, and has been widely used in the field of modern communication, especially in long-distance communication. . However, due to factors such as lack of good toughness, small diameter (usually below 100 μm), and high connection costs, silica optical fibers limit their application in short-distance communication systems, especially in fiber-to-the-home projects. In this case, people began to study the use of polymer materials to prepare plastic optical fibers with good mechanical properties, light weight, thick diameter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F234/02C08L33/12C08L27/18G02B6/02
CPCC08F214/26C08L33/12G02B6/02033C08F234/02C08L27/18
Inventor 李勇进陈德培
Owner HANGZHOU NORMAL UNIVERSITY
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