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Polycarbonate optical waveguide material and preparation method thereof

A technology of polycarbonate and optical waveguide, applied in the direction of optical waveguide and light guide, can solve the problems of poor stability, large waveguide loss, a large amount of waste water and methylene chloride, etc., and achieve the effect of mild reaction conditions

Inactive Publication Date: 2013-09-04
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

2) Wide bandwidth
[0003] Traditional polymers such as polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC) have fatal shortcomings as organic polymer optical waveguide materials: poor stability, and waveguide loss is lower than that of silicon oxide and niobium Lithium Oxide is larger
The PC produced by the traditional phosgene method has always been dominant in the international market because of its good product quality, but the process is complex, and the production process produces a large amount of waste water and methylene chloride, which is not conducive to environmental protection. Therefore, in recent years, the development of PC has been Started to turn to the simple transesterification method in the process, but because this method is completed at a higher temperature of 160-300 ° C, it is easy to cause isomerization of the molecular structure, thereby affecting the performance of the product

Method used

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  • Polycarbonate optical waveguide material and preparation method thereof
  • Polycarbonate optical waveguide material and preparation method thereof
  • Polycarbonate optical waveguide material and preparation method thereof

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preparation example Construction

[0025] The preparation method of polycarbonate optical waveguide material is:

[0026]1) Dissolve the two monomers in an aqueous solution of sodium hydroxide, and try to make a saturated solution of the sodium salt of the two monomers. After adding the catalyst triethylamine, add diphosgene triphosgene dropwise to the mixed solution under strong mechanical stirring. For the methyl chloride solution, the rate of addition was first fast and then slow. After the dropwise addition, the reaction was continued for 20 minutes, the stirring was stopped, and the solution was separated into layers.

[0027] 2) Separate the organic layer, wash the organic phase with 3% hydrochloric acid, and then wash it with deionized water until neutral, and wash it with AgNO 3 Solution identification Cl-free - After ionization, the organic phase was poured into anhydrous methanol for precipitation to obtain a gel-like polymer. Filter, wash with distilled water, dry in vacuum at 70°C for 24 hours, an...

Embodiment 1

[0031] In a 250mL four-necked flask equipped with a stirrer, a thermometer, a condenser, and a constant pressure funnel, add 21mmol of bisphenol A, 9mmol of bisphenol fluorene, 75mmol of NaOH, 200mL of water and 3mmol of catalyst triethylamine; dissolve 12.5mmol of triphosgene in 60mLCH 2 Cl 2 Under strong stirring, it was added dropwise into the reaction flask within 40 minutes, and the reaction was continued for 20 minutes. Separate the organic phase, wash the organic phase with 3% hydrochloric acid, then wash with deionized water until neutral, pour it into anhydrous methanol for precipitation, and obtain a gel-like polymer. Filter, wash with distilled water, and dry under vacuum at 70°C for 24 hours to obtain polycarbonate a.

Embodiment 2

[0033] In a 250mL four-necked flask equipped with a stirrer, a thermometer, a condenser, and a constant pressure funnel, add 15mmol of bisphenol A, 15mmol of bisphenol fluorene, 75mmol of NaOH, 200mL of water and 3mmol of catalyst triethylamine; dissolve 12.5mmol of triphosgene in 60mLCH 2 Cl 2 Under strong stirring, it was added dropwise into the reaction flask within 40 minutes, and the reaction was continued for 20 minutes. Separate the organic phase, wash the organic phase with 3% hydrochloric acid, then wash with deionized water until neutral, pour it into anhydrous methanol for precipitation, and obtain a gel-like polymer. Filter, wash with distilled water, and dry under vacuum at 70°C for 24 hours to obtain polycarbonate b.

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Abstract

The invention discloses a polycarbonate optical waveguide material which is polymerized by fluorene-9-bisphenol or copolymerized by two monomers, namely bisphenol A and fluorene-9-bisphenol, wherein the molar ratio of bisphenol A to fluorene-9-bisphenol is from (2.4:1)-(1:2.4). The invention further discloses a preparation method of the polycarbonate optical waveguide material, and the method comprises the following steps of: 1, dissolving the two monomers (bisphenol A and fluorene-9-bisphenol) in a water solution of sodium hydroxide, so as to prepare a saturated solution of sodium salt of the two monomers; adding catalyst triethylamine, adding a dichloromethane solution of triphosgene into a mixed solution in case of mechanically stirring, continuously reacting for 20 minutes after dropwise adding, stopping stirring, and layering the solution. According to the invention, the rigidity of synthesized polycarbonate can be obviously improved, the molecules are hard to freely rotate, the glass transition temperature can be obviously improved as well, and the thermal stability of a high polymer can be improved.

Description

technical field [0001] The invention relates to a polycarbonate optical waveguide material and a preparation method thereof, which belongs to the preparation category of polymer materials in integrated optical devices and can be applied to waveguide optical devices. Background technique [0002] With the deepening of optical communication and integrated optics research, optical waveguides have been widely used in various optical passive devices and integrated optical circuits, and the research of various optical integrated structures is centered on optical waveguides. Due to the unsolvable problems of materials or technology in inorganic optical waveguides, people began to study polymer film optical waveguides. The main reason is that the polymer film optical waveguide has better characteristics than the inorganic optical waveguide: 1) low loss, high thermal stability and reliability. Doping fluorine atoms can effectively reduce the optical loss at 1550 nm, and the latest r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08G64/06C08G64/24G02B6/10
Inventor 王明亮何晓华汪鲁宁张彤
Owner SOUTHEAST UNIV