Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and device for preparing annular polymer

A cyclic polymer and polymer technology, which is applied in the field of preparation of cyclic compounds, can solve the problems of low output, cumbersome operation, and low output of cyclic polymers, and achieve the goals of saving raw materials, simple operation, and increasing output rate Effect

Active Publication Date: 2012-07-18
ZHEJIANG KELI NEW MATERIAL TECH CO LTD
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This operation is cumbersome and the output is very low
[0005] So far, the biggest bottleneck in the synthesis of cyclic polymers by the ring-closing method is still the extremely low yield of cyclic polymers, because this method needs to be carried out in very dilute solutions.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for preparing annular polymer
  • Method and device for preparing annular polymer
  • Method and device for preparing annular polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1: Simple, economical and efficient preparation of cyclic polystyrene

[0054] 1. Preparation of linear polystyrene. The specific synthetic steps of linear polystyrene are shown as schematic figure 1 shown.

[0055] Add 5 mL styrene (St) (43.6 mol), 30 μL initiator 2-bromo-isobutyric acid-3-ynyl-n-butyl ester (BBMP) into a dry 25 mL reaction tube with a magnetic stirring device ( 1.8 mmol), 109 μL ligand PMDETA (5.3 mmol), 2.5×10 -2 g catalyst CuBr and 5 mL of solvent anisole, and then the reaction tube was fused tightly through the freezing-vacuum cycle three times, and placed in an oil bath at 70°C for the set time; after the reaction was completed, the reaction tube was opened and polymerized The material was dissolved and diluted in THF and passed through a short column of neutral alumina to remove metal ions. Then pour the solution into methanol to precipitate, collect the precipitate by suction filtration, and dry it in a vacuum oven at room temperat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to preparation of an annular compound, and relates to a method and device for preparing annular polystyrene. The device for preparing an annular polymer comprises a reaction chamber, a condensate accommodating chamber and a condensing and reflowing device. In the method, the annular polymer is synthesized by adopting a reaction device with a special reflowing function, regulating the system temperature and circularly distilling and condensing a solvent according to the boiling point and volatility of each solvent and the difference among polymer dissolving properties of solvents in a mixed solvent. Equipment used in the method is simple and is easy to operate, and a product is very easy to separate and purify; raw materials can be put repeatedly and a reaction solution can be used repeatedly, so that the unit consumption of the product is lowered, and cost is saved; and the method is a simple, convenient, economical and efficient method with wide monomer application range for preparing an annular polymer.

Description

technical field [0001] The invention belongs to the preparation of cyclic compounds, and relates to a method and device for preparing cyclic polystyrene. Background technique [0002] Cyclic polymers have in some respects completely different properties from linear polymers due to the lack of end groups. Such as cyclic polymers have smaller hydrodynamic radius, reduced viscosity, larger refractive index and higher glass transition temperature. In the past few decades, although the synthesis methods of cyclic polymers are much more demanding than that of linear polymers, the special properties and importance of cyclic polymers have attracted widespread attention from the polymer community. . [0003] So far, there are two main methods for the synthesis of cyclic polymers: one is the ring-expansion method of ring-type polymers obtained by continuous ring-expansion reactions of small ring-shaped molecules, and the other is the use of α, ω-bifunctional groups Intramolecular r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/48C08F20/14C08F12/08C08F20/54C08F112/08
Inventor 朱秀林朱兴周年琛张正彪朱健张伟程振平
Owner ZHEJIANG KELI NEW MATERIAL TECH CO LTD