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

Application of polypropylene as age inhibiting material caused by ultraviolet light

A polypropylene material, anti-ultraviolet light technology, applied in polymer materials and their application fields, to achieve the effect of improving the retention rate of mechanical properties

Inactive Publication Date: 2005-10-26
ZHEJIANG UNIV OF TECH
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on the UV resistance of β-crystalline polypropylene materials has not been reported so far.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1000 grams of homopolypropylene with brand F401 and 5 grams of TM-5β crystal nucleating agent produced by Shanxi Research Institute of Chemical Industry are mixed by a high-speed mixer and then extruded and granulated by a twin-screw extruder. The granulation temperature is 180 ° C. -220°C. The granulated polypropylene was first dried in an oven at 70°C for 2 hours, and then injected into a standard sample through an injection machine at a temperature of 200°C. The total crystallinity of the material analyzed by wide-angle X-ray diffraction (WAXD) is 61.5%, wherein the β crystal form accounts for 76.9%; while the total crystallinity of the common F401 sample is 54.5%, wherein the β crystal form accounts for 13.5%; the β crystal form polypropylene and After ordinary F401 was irradiated in a UV aging box for two weeks, the retention rates of the tensile strength and impact strength of β-crystalline polypropylene were 91.5% and 30.6%, respectively, while the retention rate...

Embodiment 2

[0014] Adopt 1000 grams of homopolypropylene of brand F401, 5 grams of TM-5β nucleating agent, 100 grams of bromine flame retardant to prepare β crystal flame-retardant polypropylene, and adopt 1000 grams of homopolypropylene of brand F401, bromine flame retardant 100 grams gram of ordinary flame-retardant polypropylene for comparison; the preparation process is to extrude and granulate through a twin-screw extruder after mixing in a high-speed mixer, and the granulation temperature is 180°C-220°C. After granulation, the particles are first dried in an oven at 60°C for 2 hours, and then injected into a standard sample through an injection machine, and the injection temperature is 200°C. By wide-angle X-ray diffraction (WAXD) analysis, the total crystallinity of β-crystal form flame-retardant polypropylene is 57%, of which β-crystal form accounts for 40%; while the total crystallinity of ordinary flame-retardant polypropylene samples is 50.4%, without β-crystal form; After the ...

Embodiment 3

[0016] Adopt 1000 grams of homopolypropylene of brand F401 and 5 grams of rare earth β crystal form nucleating agent WBG produced by Guangdong Weilinna Functional Materials Co., Ltd., mix through a high-speed mixer, and then extrude and granulate through a twin-screw extruder. The granulation temperature is 180℃~220℃. The granulated polypropylene was first dried in an oven at 80°C for 1.5 hours, and then injected into a standard sample through an injection machine at a temperature of 200°C. The total crystallinity of the material analyzed by wide-angle X-ray diffraction (WAXD) is 67%, wherein the β crystal form accounts for 89%; while the total crystallinity of the common F401 sample is 54.5%, wherein the β crystal form accounts for 13.5%; the β crystal form polypropylene and After ordinary F401 was irradiated in an ultraviolet aging box for two weeks, the retention rates of tensile strength and impact strength of β-crystalline polypropylene were 95.3% and 41.3%, respectively,...

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 present invention provides a polypropylene material and its application as UV-ray resisting and anti-ageing material. The described polypropylene material is made up by adding beta nucleating agent into the polypropylene material, and the addition of beta crystal type nucleating agent can make the polypropylene material produce beta crystal type conversion, as compared with alpha crystal type polypropylene material, after it is irradiated by UV ray, the retaining rate of mechanical performance of said material can be greatly raised, and the effect obtained by means of beta crystal type conversion can be identical to that obtained by adding UV-photostabilizer.

Description

(1) Technical field [0001] The invention relates to the use of a polypropylene material as an anti-ultraviolet aging material, and belongs to the field of polymer materials and applications thereof. (2) Background technology [0002] Polypropylene is a general-purpose plastic with large output and wide application. Its crystal structure can be divided into five crystal forms, including different α, β, γ, δ and pseudo-hexagonal. Among them, the α-crystal form of the monoclinic crystal system is the most common and stable one, and the currently commercialized polypropylene is basically the α-crystal form. The β crystal form can be obtained by changing the conditions of the crystallization process and adding a β crystal form nucleating agent, but the method of changing the conditions of the crystallization process is not suitable for production. In recent years, with the development of research on β-crystal nucleating agents, it is possible for us to obtain β-crystal polypropy...

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
IPC IPC(8): C08L23/12
Inventor 钱欣范文春
Owner ZHEJIANG UNIV OF TECH
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