Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for increasing crystallization temperature and crystallization rate of polymer

A technology of crystallization temperature and crystallization rate, which is applied in the field of polymer materials, can solve problems such as difficult industrialization, difficulty in finding compatibilizers, and complicated operation process, and achieves the effects of accelerated crystallization rate, increased crystallization temperature, and simple and easy method

Inactive Publication Date: 2019-03-08
FUDAN UNIV
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The copolymerization method mainly improves the crystallization properties of the polymer by adding comonomers during the synthesis process, but this method is complicated in operation and is not easy for industrialization; the blending method mainly improves the crystallinity of the polymer by mixing two polymers or multiple polymers. Crystallization properties, but it is not easy to find a suitable compatibilizer for this method; therefore, adding a nucleating agent during polymer processing is the most effective way to improve polymer crystallization in industry

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 for increasing crystallization temperature and crystallization rate of polymer
  • Method for increasing crystallization temperature and crystallization rate of polymer
  • Method for increasing crystallization temperature and crystallization rate of polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Mix 10 g of sepiolite and 200 g of distilled water into a beaker, put it into an autoclave, stir at 200° C. for 3 hours, filter with suction, dry, and pulverize to obtain activated sepiolite. The sepiolite was used as a nucleating agent, and a polyethylene terephthalate / sepiolite composite was prepared by a melt blending method. The blending conditions were 265°C, 50rpm, and 5min. The activated sepiolite and Polyethylene terephthalate is 1: 100 by mass ratio. Pure polyethylene terephthalate was also subjected to the same processing conditions as a reference sample. Differential scanning calorimetry (DSC) analysis showed that the crystallization temperature of the composite was 206.05°C, and that of pure polyethylene terephthalate was 169.15°C. It shows that the activated sepiolite can promote the crystallization of polyethylene terephthalate and is an efficient nucleating agent.

Embodiment 2

[0025] Method is with embodiment 1. Change the mass ratio of sepiolite to polyethylene terephthalate to 5:100. Through DSC analysis, it was found that the crystallization temperature of the composite was 212.77°C, and that of pure polyethylene terephthalate was 169.15°C. It shows that the activated sepiolite can promote the crystallization of polyethylene terephthalate and is an efficient nucleating agent.

Embodiment 3

[0027] In a 500ml four-necked flask equipped with a mechanical stirrer, a condenser, and a thermometer, successively add 5g of finely ground sepiolite, 250mL of toluene, and 10mL of silane coupling agent, heat and stir under nitrogen protection until the toluene refluxes, and cool to At room temperature, wash repeatedly with anhydrous toluene, absolute ethanol and acetone respectively to remove unreacted coupling agent, and dry in vacuum to obtain activated sepiolite modified by silane coupling agent. The sepiolite was used as a nucleating agent, and the polyethylene terephthalate / sepiolite composite was prepared by the melt blending method. The blending conditions were 265°C, 50rpm, 5min, and the activated sepiolite The mass ratio with polyethylene terephthalate is 1: 100. Pure polyethylene terephthalate was also subjected to the same processing conditions as a reference sample. DSC analysis showed that the crystallization temperature of the complex was 214.9°C, and that of ...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of polymer materials, in particular to a method for increasing the crystallization temperature and the crystallization rate of a polymer. According to themethod, sepiolite is adopted as a nucleating agent for the polymer, and a polymer / sepiolite composite is obtained by mixing, so that the crystallization temperature of the polymer is increased and thecrystallization of the polymer is accelerated. Sepiolite, especially the activated sepiolite, has a high specific surface area and can be well dispersed in the polymer body to promote the crystallization of the polymer. The method provided by the invention is simple, easy to operate and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for increasing the polymer crystallization temperature and crystallization rate. Background technique [0002] For semi-crystalline polymers such as polyethylene terephthalate, polypropylene, polylactic acid, etc., their crystallization behavior, crystal morphology, and crystal size directly affect the processing and application properties of the product. The crystallization properties of polymers can be improved by copolymerization, blending and adding nucleating agents. The copolymerization method mainly improves the crystallization properties of the polymer by adding comonomers during the synthesis process, but this method is complicated in operation and is not easy for industrialization; the blending method mainly improves the crystallinity of the polymer by mixing two polymers or multiple polymers. Crystallization properties, but it is not eas...

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): C08L67/02C08K3/34C08K9/06C08K9/04
CPCC08K3/346C08K9/04C08K9/06C08L2205/24C08L67/02
Inventor 唐萍聂智军段华张薇张红东
Owner FUDAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com