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ID-12 Identification of an unknown plastic material.

연진에스텍 2021-06-22 11:24:19 78

The   idenPol   QA2   has   three   modes   of   operation: 

The idenPol QA2 

Comparison,    Confirmation    and    Identification.    The Identification  mode  of  the  system  can  be  used  to identify an unknown plastic material by comparing its behaviour to a library of known thermoplastics (PE, PP,  PA6 etc) that is built into the system software. 
The  idenfication  of  an  unknown  material  requires  a match  of  several  thermophysical  properties  that  are measured as the unknown plastic is heated, these are: 

  • Amorphicity - a measure of the degree of orientation of the polymer chains.  
  • Glass  transition  temperature  -  the  temperature  at which  non  crystalline  material  starts  to  become mobile and soften. 
  • Melting  point  temperature  -  the  temperature  at which crystalline material starts to melt. 
  • End point temperature - the temperature at which the plastic loses mechanical integrity.  

Although there are many methods available to confirm the identy of a plastic material, few are as quick—or as cheap—as that of the identiPol. Best of all, an unskilled and untrained operator can be shown how to use the system in just a few minutes.  
The test sample was prepared in the standard way. A couple of plastic granules were first moulded within the identiPol  QA2  to  give  a  consistent  material  for measurement.  This  was  then  followed  by  a  second heating  regime  to  measure  the  properties  of  the unknown sample.  


The following parameters were measured:  

  • Amorphicity = Semi-crystalline 
  • Glass Transition = 51.5°C 
  • Melting Point = 206.8°C 
  • End Point = 204.2°C 

Following the test the software displays a table of the closest matches to the unknown. 

The table below illustrates how the unknown plastic has been  correctly  and  unambiguously  identified  as  PA6 (Nylon  6  -  a  material  widely  used  for  its  high  tensile strength),  based  upon  matching  the  measured  parameters with the library stored within the system’s memory.  

Table of results displayed in Identification Mode 

The  entire  test,  from  selecting  a  couple  of  plastic  granules, to prinng out a certificate of analysis, takes only 15-20 minutes.