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Polyphenylacetylene preparing method initiated by phenylsilane

A polyphenylene vinylene and phenylsilane technology, applied in the field of polyphenylene vinylene preparation, can solve the problems of large molecular weight distribution coefficient and low polymer yield, and achieve the effect of increasing the reaction time

Active Publication Date: 2017-04-26
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When metal salts or complexes are used as catalysts, although the molecular weight of the obtained PPA is higher, the molecular weight distribution coefficient is larger, and the polymer yield is lower

Method used

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  • Polyphenylacetylene preparing method initiated by phenylsilane
  • Polyphenylacetylene preparing method initiated by phenylsilane
  • Polyphenylacetylene preparing method initiated by phenylsilane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Catalyst (COD) consumption is 4.0‰ of monomer mass, initiator (PSH) consumption is 2% of monomer consumption, in N 2 In atmosphere protection, under 30 ℃, carry out phenylacetylene (PA) bulk polymerization reaction, gained experimental result is as follows table 1 (the number-average molecular weight M of polymer n and molecular weight polydispersity index PDI are measured by Malvern Viscotek 270Max multi-detector gel permeation chromatography):

[0016] Table 1 The results of PA polymerization with PSH as the initiator and 4.0‰COD as the catalyst

[0017] Table 1. Polymerization of PA initiated by PSH and catalyzed by CODcatalyst

[0018]

Embodiment 2

[0020] Reduce catalyst (COD) consumption to be 2.0‰ of monomer mass, initiator (PSH) consumption to be 2% of monomer consumption, in N 2 In the atmosphere protection, phenylacetylene (PA) polymerization was carried out at 30°C, and the experimental results obtained are as follows in Table 2:

[0021] Table 2 Effect of catalyst concentration on polymerization of PA in PSH / COD reaction system

[0022] Table 2. The effect of catalyst concentrations on the M n and PDI ofPPA

[0023]

[0024] With the reduction of catalyst consumption, the reaction time is obviously prolonged, but the molecular weight of the product is improved to some extent.

Embodiment 3

[0026] Keep catalyst (COD) consumption constant as 2.0‰ of monomer quality, same initiator (PSH) consumption is 2% of monomer consumption, in N 2 In the atmosphere protection, the phenylacetylene (PA) polymerization reaction was carried out at an elevated reaction temperature of 40°C. The experimental results obtained are shown in Table 3 below:

[0027] Table 3 The influence of temperature on the polymerization of PA in PSH / COD reaction system

[0028] Table 3. The effect of polymerization temperature on the M n and PDI ofPPA

[0029]

[0030] The raising of temperature accelerates the reaction rate, but the molecular weight of the product decreases and the PDI becomes larger.

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Abstract

The invention discloses a polyphenylacetylene preparing method initiated by phenylsilane. The preparing method includes the steps that under catalysis of (1,5-cyclooctadiene) platinum chloride, phenylsilane is used as initiator, phenylacetylene is subjected to polymerization reaction, and polyphenylacetylene is obtained after reaction is finished. As the new catalyst and initiator are adopted in the preparing method, the molecular weight of the product polyphenylacetylene is higher, and the molecular weight distribution range is narrower.

Description

technical field [0001] The invention belongs to the field of polyphenylene vinylene preparation, and in particular relates to a polymerization reaction of phenylene vinylene (PA) using a transition metal complex as a catalyst and an organosilane compound as an initiator to prepare PPA with high molecular weight and narrow molecular weight distribution. Background technique [0002] Polyphenylene vinylene (PPA) is a kind of polyacetylene conjugated polymer, which has the unique optical, electrical and magnetic properties of conjugated polymers. It is widely used in plastic electronics, organic ferromagnets, photovoltaic cells, electroluminescent materials, electric Chemical sensors, molecular devices and other fields are widely used. The molecular weight of PPA has an important influence on its conductivity and other photoelectric properties, and the conductivity increases with the increase of molecular weight. [0003] In the past, the energy consumption of PPA prepared by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F138/00C08F4/80C08F2/00
CPCC08F2/00C08F4/80C08F138/00
Inventor 祝一锋唐华东蒋凤娇
Owner ZHEJIANG UNIV OF TECH
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