Preparation method of polymethyl methacrylate macromolecule extended chain

A polymethyl methacrylate and polymer technology, which is applied in the field of preparation of polymethyl methacrylate polymer extension chains, can solve the problems of complicated preparation process and poor repeatability of PMMA extension chains, and achieves preventing agglomeration and stretching. High degree and good controllability

Inactive Publication Date: 2016-07-27
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the preparation process of the existing PMMA extended chain is complicated, especially in the post-processing process, the environmental humidity and annealing time need to be strictly controlled, and the repeatability is poor.

Method used

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  • Preparation method of polymethyl methacrylate macromolecule extended chain
  • Preparation method of polymethyl methacrylate macromolecule extended chain
  • Preparation method of polymethyl methacrylate macromolecule extended chain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of the polymethyl methacrylate polymer extended chain of the present embodiment is carried out according to the following steps:

[0020] (1) Preparation of PS-b-PMMA dilute solution: first dissolve a certain mass of PS-b-PMMA powder in toluene, and the molecular weight of the PS-b-PMMA block copolymer selected is 130,000-133,000, Mw / Mn= 1.10, it was prepared into a toluene solution with a weight concentration of 0.1wt%, added toluene for multiple dilutions, and finally prepared into a very dilute solution of PS-b-PMMA with a weight concentration of 0.0001wt% for subsequent use;

[0021] (2) Preparation of polymer extended chains by spin coating method: put the newly split mica sheet as the base on the spin coater, set the speed and time of the spin coater in advance, and the speed of the spin coater is 3000rpm , the spin coating time is 30s, drop the very dilute solution of PS-b-PMMA in step (1) onto the surface of mica, cover the lid, start the ...

Embodiment 2

[0023] The preparation method of the polymethyl methacrylate polymer extended chain of the present embodiment is carried out according to the following steps:

[0024] (1) Preparation of PS-b-PMMA dilute solution: first dissolve a certain amount of PS-b-PMMA powder in toluene, wherein the selected PS-b-PMMA block copolymer has a molecular weight of 130,000-360,000, Mw / Mn= 1.09, be prepared into a toluene solution with a weight concentration of 0.3wt%, add toluene to carry out multiple dilutions, and finally prepare a very dilute solution of PS-b-PMMA with a weight concentration of 0.0003wt% for subsequent use;

[0025] (2) Preparation of polymer extended chains by spin coating method: put the newly split mica sheet as the base on the spin coater, set the speed and time of the spin coater in advance, and the speed of the spin coater is 4000rpm , the spin coating time is 20s, drop the very dilute PS-b-PMMA solution in step (1) onto the mica surface, cover the lid, start the spin...

Embodiment 3

[0027] The preparation method of the polymethyl methacrylate polymer extended chain of the present embodiment is carried out according to the following steps:

[0028] (1) Preparation of PS-b-PMMA dilute solution: first dissolve a certain amount of PS-b-PMMA powder in toluene, wherein the selected PS-b-PMMA block copolymer has a molecular weight of 140,000-65,000, Mw / Mn= 1.09, be prepared into a toluene solution with a weight concentration of 0.2wt%, add toluene to carry out multiple dilutions, and finally prepare a very dilute solution of PS-b-PMMA with a weight concentration of 0.0002wt% for subsequent use;

[0029] (2) Preparation of polymer extended chains by spin coating method: put the newly split mica sheet as the base on the spin coater, set the speed and time of the spin coater in advance, and the speed of the spin coater is 2500rpm , the spin coating time is 40s, drop the very dilute PS-b-PMMA solution in step (1) onto the mica surface, cover the lid, start the spin ...

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Abstract

The invention belongs to the technical field of macromolecular physics or condensed matter physics, and particularly relates to a preparation method of a polymethyl methacrylate macromolecule extended chain.A polystyrene- polymethyl methacrylate segmented copolymer is adopted as a raw material, dissolved into methylbenzene, repeatedly diluted to form a PS-b-PMMA extremely-low solution of the certain concentration, the rotating speed and time are controlled, then, the diluted solution is dropped on the surface of a newly-split mica substrate for spin-coating, a sample is taken out and dried at room temperature, and the PMMA extended chain can be observed under the atomic force microscope.The preparation method is simple and good in controllability; the prepared polymethyl methacrylate macromolecule extended chain is dispersed on the mica substrate uniformly, the extending degree is high, and the polymethyl methacrylate macromolecule extended chain is particularly applicable to research on conformation conversion and corresponding condensed characteristics.

Description

technical field [0001] The invention belongs to the technical field of polymer physics or condensed matter physics, and in particular relates to a preparation method of polymethyl methacrylate polymer extended chains. Background technique [0002] Macromolecules have many special shapes, structures and properties when they exist in the form of single chains. As a research hotspot in polymer condensed matter, polymer single chains may have intramolecular entanglements, but there is no entanglement between molecular chains. There is a certain mutual attraction between molecular chain segments, which is completely different from the mutual attraction between molecular chains. Tangled multi-chain condensate. At present, the morphology and conformational transition of extended chains of polymers can be directly observed by atomic force microscopy (AFM). [0003] The application number is 200410013589.5, and the Chinese patent titled a preparation method of a polymer single chai...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J3/09C08L53/00
CPCC08J5/18C08J3/09C08J3/092C08J2353/00
Inventor 洪晓东姜海艳陈跃辉
Owner LIAONING TECHNICAL UNIVERSITY
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