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Technical Discussions
Al Rashid Wahab
Al Rashid Wahab
02:06 Oct-14-1998
UT on polymers

I would like to know if UT is possible on polymers, spesifically test on PP or EPR. If it is, what are the features on such testing. What information could I get from the test?

Thank you in advance.


    
 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
05:20 Oct-14-1998
Re: UT on polymers

: I would like to know if UT is possible on polymers, spesifically test on PP or EPR. If it is, what are the features on such testing. What information could I get from the test?

: Thank you in advance.

Most of the activity in the field of ultrasonic testing of polymers involves thickness gaging of molded and extruded products. In the case of extruded tubes and pipes, thickness gaging is often performed in an in-process or on-line mode. In the case of more complex molded parts, it is usually done as an off-line quality control check. It is generally possible to locate unwanted bubbles or voids in polymers, and again this is sometimes done in-process, such as in critical applications like high voltage cable jackets. Finally (and much less commonly implemented), it is possible to analyze material properties of polymers by measuring changes in sound velocity and/or attenuation.

You can find further details on theory and practice in the NDT Applications section of my company's web site at

--Tom Nelligan
Senior Applications Engineer
Panametrics, Inc.


    
 
 
Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998, 604

Rolf Diederichs

Director,
NDT.net,
Germany,
Joined Nov 1998
604
08:42 Oct-14-1998
Re: UT on polymers



    
 
 
Jeff Phillips
Jeff Phillips
03:37 Oct-15-1998
Re: UT on polymers



    
 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1234

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1234
03:21 Oct-15-1998
Re: UT on polymers
NDE in general is applied to Polymers of many varieties.
High and low temperture applications, cure rates, degree of cross-linking, etc.
A couple of references might help illustrate the extent of this aplication.

Also, contact Dr. N.D.Patel at fallon@netcom.ca

The books:
Title:
Polymer NDE : proceedings of the European Workshop on Nondestructive Evaluation of
Polymers and Polymer Matrix Composites, Hotel Golf Mar, Termar do Vimeiro, Portugal,
September 4-5, 1984 / edited by K.H.G. Ashbee. -
Conference Name:
European Workshop on Nondestructive Evaluation of Polymers and Polymer Matrix
Composites (1984 :
Publisher:
Lancaster, Pa. : Technomic, c1986.
Type of Material:
Book
Format:
Print Material
Call Number:
TA417.2.E96 1984
Subject(s):
Non-destructive testing--Congresses.
Polymers and polymerization--Testing --Congresses.
Polymeric composites--Testing --Congresses.
Description:
xiv, 332 p. : ill. ; 24 cm.
ISBN/ISSN:
0877624461
Notes:
Includes bibliographies and index.


Title:
Physical chemistry. -
Relaxation and viscoelastic properties of heterogeneous polymeric compositions.
Electro-optic methods for characterizing macromolecules in dilute solution.
Ultrasonic degradation of polymers in solution.
Series:
Advances in polymer science ; 22.
Authors:
Lipatov, IU. S. (IUrii Sergeevich), 1927-. Relaxation and viscoelastic properties of heterogeneous
polymeric compositions. 1977.
Jennings, Barry Randall, 1939-. Electro-optic methods for characterizing macromolecules in dilute
solution. 1977.
Basedow, Arno M. Ultrasonic degradation of polymers in solution. 1977.
Publisher:
Berlin : Springer-Verlag, 1977.
Call Number:
QD281.P6F6 v. 22

Hope this helps;
Ed




    
 
 
Stojan Rendevski
Stojan Rendevski
01:54 Jun-25-1999
Re: UT on polymers



    
 
 
Dongbiao Wang
Dongbiao Wang
02:22 Jul-11-2001
Re: UT on polymers
Hi:
Can recommend some articles and experiment setup for
on-line polymer extrusion? It is used for characterization of polymer dispersity, density, viscosity, and etc.
Thank you in advance.
wang dongbiao


    
 
 
Dr. Patel
R & D, Consultant to Universities/Industries
Fallon Ultrasonics/McMaster University, Canada, Joined May 2001, 20

Dr. Patel

R & D, Consultant to Universities/Industries
Fallon Ultrasonics/McMaster University,
Canada,
Joined May 2001
20
08:04 Jul-11-2001
Re: UT on polymers
: Hi:
: Can recommend some articles and experiment setup for
: on-line polymer extrusion? It is used for characterization of polymer dispersity, density, viscosity, and etc.
: Thank you in advance.
: wang dongbiao
.There are some Universities like Mississippi State University and McMaster University has used ultrasonics for characterisation of polymers using Fallon Ultrasonic System and they had success. I do not have articles but try to refer some papers By Dr. Balakrishnan or Dr. Johari. You need very accurate time measurements and you have to use both shear wave for viscosity and Longitudingal for rest of the requirements. Both change in croslink density, compositional variation etc information has be obtianed.
If you need more information contact me

Regards

Dr. Patel



    
 
 

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