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High syndiotactic vertical structure functionalized polystyrene polymer and preparation method thereof

A polystyrene and styrene-based technology, which is applied in the field of high syndiotactic functionalized polystyrene polymers and their preparation, can solve the problems of degradation, difficult control of functional group distribution, and local polymer chain structure damage. , to achieve the effect of high syndiotactic selective homopolymerization and expanding the scope of application

Active Publication Date: 2018-09-04
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The functionalized syndiotactic polystyrene synthesized by this method is difficult to control the distribution of functional groups, and it is easy to cause local polymer chain structure damage or even degradation.

Method used

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  • High syndiotactic vertical structure functionalized polystyrene polymer and preparation method thereof
  • High syndiotactic vertical structure functionalized polystyrene polymer and preparation method thereof
  • High syndiotactic vertical structure functionalized polystyrene polymer and preparation method thereof

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preparation example Construction

[0070] A preparation method for highly syndiotactic functionalized polystyrene polymer, comprising the following steps:

[0071] The functionalized styrene is homopolymerized under the action of the catalyst, or the styrene and the functionalized styrene are copolymerized under the action of the catalyst to prepare a high syndiotactic functionalized polystyrene polymer.

[0072] The present invention uses rare earth complexes, organoboron compounds and organoaluminum compounds as catalysts to synthesize high syndiotactic copolymers of styrene and functionalized styrene by means of coordination polymerization, and the functionalized styrene structural units are in the polymer The insertion rate of the polymer can be adjusted arbitrarily, breaking through the previous limitation of low insertion rate of functionalized monomers in polymers, and the insertion rate can be as high as 100%. Due to the carbon-carbon double bond or carbon-carbon triple bond in the polymer, the subseque...

Embodiment 1

[0133] Take 5mL of Catalyst 1 solution, put it in a polymerization bottle that has been treated with anhydrous and oxygen free, add 5.0mmol functionalized styrene monomer A and 5.0mmol styrene monomer, carry out polymerization reaction at 25°C for 1 hour, then add 2mL ethanol solution of hydrochloric acid with a volume concentration of 10% terminates the polymerization reaction, pours the reaction solution into 100mL ethanol for sedimentation, and obtains a copolymer of styrene and functionalized styrene; then puts the obtained polymer in a vacuum drying oven at 40°C Drying at low temperature for 48 hours to obtain a dry constant weight copolymer of styrene and functionalized styrene with a total conversion rate of 100%.

[0134] H NMR spectroscopy ( 1 H NMR) and carbon nuclear magnetic resonance ( 13 C NMR) analyzes the copolymer of styrene and the functionalized styrene that obtains, and the result shows that its syndiotacticity is greater than 99%; The intercalation rate o...

Embodiment 2～51

[0136] According to the method described in Example 1, using the raw material ratio and reaction conditions in Table 2, the copolymers of styrene and functionalized styrene, or the homopolymer of functionalized styrene were prepared respectively; Table 2 is the present invention The raw material ratio, reaction conditions, and performance test results of Examples 2-51 are summarized.

[0137] Table 2 Raw material ratio, reaction conditions, and performance test results summary of Examples 2-51 of the present invention

[0138]

[0139] The copolymers of styrene and p-isopropenylstyrene prepared in Example 9 of the present invention were detected by proton nuclear magnetic resonance spectrum and carbon spectrum, and the detection results are shown in figure 1 with figure 2 ,in figure 1 It is the H NMR spectrum of the copolymer of styrene and p-isopropenylstyrene prepared in Example 9 of the present invention, figure 2 It is the carbon nuclear magnetic resonance spectrog...

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Abstract

The invention relates to the field of polymer preparation, in particular to a high syndiotactic vertical structure functionalized polystyrene polymer and a preparation method thereof, and solves the technical problems that the existing polar group containing functionalized syndiotactic vertical structure polystyrene has heteroatom functional groups, the polymerization activity of the catalysis system and the functional group distribution can be influenced to a certain degree. According to the method, a cyclopentadienyl rare earth compound is used as a catalyst; isopropenyl, alkane alkynyl, arylenealkyne or silicon alkynyl functional styrene monomers are directly subjected to homopolymerization; or copolymerization is performed with styrene; the novel structure high syndiotactic vertical structure functionalized polystyrene polymer is prepared. Experiment results prove that the syndiotactic selectivity of the high syndiotactic vertical structure functionalized polystyrene polymer provided by the invention is not lower than 90 percent; in addition, the insertion rate of the functionalized styrene can be freely regulated and can be up to 100 percent or above. Meanwhile, double-bond orthree-bond groups are contained in the polymers; other functional groups can be conveniently introduced on the groups.

Description

technical field [0001] The invention relates to the field of polymer preparation, in particular to a high syndiotactic functionalized polystyrene polymer and a preparation method thereof. Background technique [0002] High syndiotactic polystyrene (sPS) was first realized by coordination polymerization using titanocene metal catalysts by Idemitsu Kosan Company of Japan in 1986. sPS has the characteristics of high melting point, high crystallinity, high elastic modulus, low dielectric constant, low loss factor, and excellent heat resistance and solvent resistance, and has become a very promising engineering plastic. However, sPS also has disadvantages such as high brittleness, lack of polar groups, and narrow processing temperature window, which limit the application field of sPS. Therefore, the synthesis of polar group-functionalized syndiotactic polystyrene has become one of the hotspots of scientific researchers. [0003] At present, the usual method is to directly post-...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/34C08F230/08
CPCC08F212/08C08F212/34C08F230/08
Inventor 崔冬梅张震李世辉
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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