Fluorine containing optical plastic perform-rod with gradient refractive index, preparing process and usage thereof

A gradient refractive index and preform technology, which is applied in the field of fluorine-containing gradient refractive index optical plastic preforms, can solve the problems of low working temperature, high cost, and reduced polymer stability.

Inactive Publication Date: 2005-09-21
SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Most traditional plastic optical fibers can only work below 100 degrees. Compared with silica optical fibers, the operating temperature is very low, which is also an important factor limiting the application of plastic optical fibers.
2. Mismatch between working wavelength and silica fiber
Although the loss of plastic optical fiber after deuteration is greatly reduced, the cost of deuteration is expensive, and it is gradually abandoned by people.
Moreover, because the content of elements such as Cl and Br in the repolymer is too high, the stability of the polymer will be reduced, so the substitution of halogen for hydrogen atoms is mainly based on fluorine substitution.

Method used

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  • Fluorine containing optical plastic perform-rod with gradient refractive index, preparing process and usage thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Add 4 grams of hexafluorobutyl methacrylate containing 0.3% AIBN into a sealed tube with a length of about 15 cm and a diameter of 14 mm. Freeze-drying, evacuation, and nitrogen filling were repeated three times to seal the sealed tube. The sealed tube was placed horizontally and rotated, and reacted at 60°C for 72 hours. A polymerized hollow tube is obtained. The spout was cut and 12 grams of a solution of 0.3% BPO and 5% benzyl benzoate in hexafluorobutyl methacrylate was added. Stand vertically for 2 hours, heat up to 60°C, cool to room temperature after 1 hour, then react at 60°C for 72 hours, and continue to react at 80°C and 100°C for 24 hours each. After the reaction is finished, it is cooled in a refrigerator, and the outer glass is removed to obtain a transparent preform. The refractive index of the fluorine-containing gradient index optical plastic preform of the preform is as follows figure 1 As shown,.

Embodiment 2

[0031] Add 8 g of tetrafluoropropyl methacrylate containing 0.3% AIBN to a sealed tube with a length of 15 cm and a diameter of 14 mm to freeze-dry, vacuumize and fill with nitrogen three times to seal the tube. The sealed tube was placed horizontally and centrifuged, and reacted at 67°C for 48 hours. A polymerized hollow tube is obtained. The nozzle of the tube was cut and 8 g of tetrafluoropropyl methacrylate solution containing 0.3% BPO and 8% bromobenzene was added. Stand vertically for 1 hour, heat up to 60°C, cool to room temperature after 1 hour, then continue to react at 67°C for 72 hours, and continue to react at 80°C and 100°C for 48 hours respectively. After the reaction is finished, it is cooled in a refrigerator, and the outer glass is removed to obtain a transparent preform.

Embodiment 3

[0033] Add 96 grams of trifluoroethyl methacrylate containing 0.3% BPO into a sealed tube with a length of 60 cm and a diameter of 28 mm to freeze-dry, vacuumize and fill with nitrogen three times to seal the tube. The sealed tube was placed horizontally in a high-speed centrifuge, and reacted at 65°C for 72 hours. A polymerized hollow tube is obtained. The nozzle was cut open and 36 grams of a solution of 0.3% BPO and 10% biphenyl in tetrafluoropropyl methacrylate was added. Stand vertically for 0.5 hours, raise the temperature to 60°C, cool to room temperature after 1 hour, then continue to react at 67°C for 55 hours, and continue to react at 80°C and 100°C for 24 hours each. After the reaction is finished, it is cooled in a refrigerator, and the outer glass is removed to obtain a transparent preform.

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Abstract

This invention relates to a fluorine-included gradient refractivity preparation stick and its preparing method and usage. The invention adopts stepwise aggregation of fluorine-included acrylate, comprising the steps of aggregating integral to prepare hollow pipe, then putting some inert dopant integral through swelling gel aggregation to attain optical preparing stick with gradient refractivity. The stick can be used in making material of plastic optical fiber.

Description

technical field [0001] The invention relates to a fluorine-containing gradient refractive index optical plastic preform, a preparation method and application. technical background [0002] Since Corning Corporation of the United States successfully prepared the first high-purity, low-loss silica optical fiber in 1970, optical fiber communication has attracted more and more attention because of its high speed, large capacity and excellent anti-interference performance. And it has been widely used in the field of modern communication, especially in long-distance communication. However, silica optical fiber lacks good toughness, has a thin diameter, usually below 100um, and high connection costs, which limit its application in short-distance communication systems, especially 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 (500um-1mm), eas...

Claims

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Application Information

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IPC IPC(8): B29B11/14B29K
Inventor 卿凤翎周春才许建明
Owner SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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