Polymer composition, plastic optical fiber, plastic optical fiber cable and method for producing plastic optical fiber

A plastic optical fiber, polymer technology, applied in optics, light guides, optical components, etc., to achieve the effect of reducing transmission loss, excellent transparency, and excellent heat resistance

Inactive Publication Date: 2007-12-12
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technology is only applicable to a single polymer (homopolymer), and for the copolymer with a larger refractive index difference between the above-mentioned block copolymerizable copolymer and the structural monomer, there is no sufficient Example of reducing light scattering loss and practical use as a POF core material

Method used

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  • Polymer composition, plastic optical fiber, plastic optical fiber cable and method for producing plastic optical fiber
  • Polymer composition, plastic optical fiber, plastic optical fiber cable and method for producing plastic optical fiber
  • Polymer composition, plastic optical fiber, plastic optical fiber cable and method for producing plastic optical fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0255] Mix 50 parts by mass of each of (R)-βMMBL obtained in (Synthesis 7) and (S)-βMMBL obtained in (Synthesis 8) to obtain a mixture of (R) and (S) bodies of β MMBL ((R / S)-βMMBL) (h).

[0256] In a beaker, 0.3 parts by mass of a polymerization initiator dimethyl 2,2'-azobisisobutyrate (V-601), 0.3 g The chain transfer agent n-butyl mercaptan of parts by mass is stirred. Put the stirred and dissolved mixture into a glass ampoule tube, repeat freezing and vacuum removal of volatile components 5 times, remove dissolved oxygen, heat treatment at 65°C for 12 hours in an oil bath, and then heat treatment at 120°C for 5 hours to complete the polymerization.

[0257] The obtained massive polymer was dissolved in methylene chloride, precipitated with methanol, filtered, washed with water, and dried at 75° C. for 24 hours to obtain a polymer. Thereafter, it was extruded at a barrel temperature of 230° C. using a twin-screw extruder (PCM30, manufactured by Ikegai Co., Ltd.), and pe...

Embodiment 2～7、 comparative example 1～7

[0261] Except for changing the composition of the mixture of (R)-βMMBL and (S)-βMMBL and MMA as shown in Table 1, polymerization, granulation, production of test pieces were carried out in the same manner as in Example 1, and various evaluations were performed. The obtained evaluation results are shown in Table 1 together.

Embodiment 8～11、 comparative example 8～11

[0263] Except for changing the composition of the mixture of (R)-βMMBL and (S)-βMMBL and MMA as shown in Table 2, polymerization, granulation, preparation of test pieces were carried out in the same manner as in Example 1, and light transmittance was evaluated. . Table 2 shows the obtained evaluation results together.

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Abstract

Disclosed is a polymer composition containing 5-100% by mass of a lactone compound unit (A) represented by the general formula (1) and 0-95% by mass of a (meth)acrylate unit (B) as the constitutional units. The lactone compound unit (A) contains a unit (S) represented by the general formula (2) and a unit (R) represented by the general formula (3) in a mass ratio of from 70/30 to 30/70. The polymer composition has a total light scattering loss of not more than 100 dB/km, and is excellent in heat resistance and transparency.

Description

technical field [0001] The present invention relates to a polymer composition excellent in transparency and heat resistance, a plastic optical fiber, a plastic optical cable and a method for producing the plastic optical fiber. Background technique [0002] Plastic optical fiber (POF) is used as a data transmission medium in lighting applications, FA sensors, or communication fields due to its advantages of low price, light weight, softness, and large diameter. As the core material of plastic optical fibers, it is used Polymethyl methacrylate (PMMA) resin, which has certain mechanical strength and transmission characteristics, is the main component. [0003] For POF with PMMA as the core material, since the glass transition temperature (Tg) of PMMA is around 110°C, even if it is coated with a polymer with high heat resistance on the outside, the upper limit of its practical application temperature is 110°C . Therefore, in applications that additionally require heat resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F24/00C08J3/00G02B6/00
Inventor 青柳周塚本好宏岩坂敬治坂下启一
Owner MITSUBISHI RAYON CO LTD
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