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

Characterization method of nascent ultrahigh molecular weight polyethylene

An ultra-high molecular weight, nascent ecology technology, applied in the direction of material excitation analysis, preparation of test samples, Raman scattering, etc.

Inactive Publication Date: 2020-01-03
SUN YAT SEN UNIV
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a characterization method for nascent UHMWPE in view of the shortcomings of the existing nascent UHMWPE structure and morphology characterization

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
  • Characterization method of nascent ultrahigh molecular weight polyethylene
  • Characterization method of nascent ultrahigh molecular weight polyethylene
  • Characterization method of nascent ultrahigh molecular weight polyethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A characterization method for nascent ultra-high molecular weight polyethylene, specifically comprising the steps of:

[0036] S1. Weigh 5 mg of nascent UHMWPE with a viscosity average molecular weight of 3.0×10 6 g / mol, put it in 30mL of distilled water, then sonicate at room temperature for 12s, then use a 200-mesh copper net to pick up a small amount of turbid liquid, place it in a vacuum oven at 60°C for 6min, and finally flatten the dried sample slightly Fixed on a variable temperature heating stage equipped with an optical microscope observation port;

[0037] S2. Microscopic Raman planar imaging: place the variable temperature hot stage with the fixed sample on the stage of the microscopic Raman spectrometer, select a magnification of 100 times, and focus on the sample under dark field conditions to obtain a clear field of vision observation Go to the surface of the sample and save the photo; use the Nano Measurer software to count the particle size of the sampl...

Embodiment 2

[0049] A characterization method for nascent ultra-high molecular weight polyethylene, specifically comprising the steps of:

[0050] S1. Weigh 5 mg of nascent UHMWPE with a viscosity-average molecular weight of 6.0×10 6 g / mol, put it in 30mL of distilled water, then sonicate at room temperature for 18s, then use a 200-mesh copper net to pick up a small amount of turbid liquid, place it in a vacuum oven at 70°C for 5min, and finally flatten the dried sample slightly Fixed on a variable temperature heating stage equipped with an optical microscope observation port;

[0051] S2. Microscopic Raman planar imaging: place the variable temperature hot stage with the fixed sample on the stage of the microscopic Raman spectrometer, select a magnification of 100 times, and focus on the sample under dark field conditions to obtain a clear field of vision observation Go to the surface of the sample and save the photo; use the Nano Measurer software to count the particle size of the sampl...

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 discloses a characterization method of nascent ultrahigh molecular weight polyethylene. The method comprises the steps of (S1) sample pretreatment; (S2) micro-Raman planar imaging; (S3)polarized Raman planar imaging; (4) variable-temperature Raman spectroscopy; and (5) data analysis: carrying out Raman peak fitting on data collected in the step (S2), (S3) or (S4) by using a Lorentzfunction, converting a map into peak area and carrying out computing processing by adopting a formula (1), thereby obtaining a crystallinity distribution map of the nascent UHMWPE (ultrahigh molecularweight polyethylene), wherein alphac is crystallinity, I1416 is peak area of 1416cm<-1>, and I1295+1305 is the sum of the peak area of 1295cm<-1> and 1305cm<-1>. According to the characterization method disclosed by the invention, a micro-morphology of the nascent UHMWPE and corresponding space structure information can be obtained, and structure and morphology change processes of a correspondingarea of the nascent UHMWPE under the temperature effect can be obtained on the basis of not destroying a micro-area structure of the UHMWPE, thereby effectively establishing an association relationship between the micro-morphology change and the structure change of the nascent UHMWPE; and the characterization method can be used for guiding synthesis, processing and application of the UHMWPE.

Description

technical field [0001] The invention relates to the technical field of characterization of polymer materials, and more specifically, to a characterization method of nascent ultra-high molecular weight polyethylene. Background technique [0002] Due to its extremely high molecular weight and special condensed structure, ultra-high molecular weight polyethylene (UHMWPE) has many excellent properties such as high impact strength, low wear resistance and good biocompatibility, and has great potential in many fields. extremely critical applications. However, the ultra-high molecular weight also limits the processing performance of UHMWPE, and it is difficult to carry out continuous processing and molding by melt extrusion, injection molding and other methods. Usually, it is necessary to directly use the primary particles formed by polymerization for molding or plunger extrusion. The UHMWPE primary particles formed by such polymerization are called nascent UHMWPE. The aggregate ...

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): G01N21/65G01N1/28
CPCG01N1/28G01N21/65
Inventor 余丁山陈潇川曹长林王军霞陈旭东
Owner SUN YAT SEN UNIV