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Investigation of precipitated calcium carbonate as a processing aid and impact modifier in poly(vinyl chloride)

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journal contribution
posted on 10.01.2014, 11:06 by N.A.S. (Anne) Fernando, Noreen Thomas
The effect of ultra-fine precipitated calcium carbonate (PCC), with a primary particle size of 50 nm, on the fusion behavior and mechanical properties of Ca/Zn stabilized poly(vinyl chloride) PVC has been investigated. The optimum concentration of PCC was determined and, in addition, experimental design was used to examine possible synergies between PCC and two important additives in an unplasticized PVC (PVC-U) formulation: namely, the processing aid and impact modifier. Dry blends were extruded and tested by differential scanning calorimetry, tensile testing, and Charpy impact testing. The results confirm that ultrafine PCC can give rise to large improvements in single notch impact strengths. Control values of 8 kJ/m were increased to 79 kJ/m through the addition of ultra-fine PCC. There was also found to be a significant increase in fusion levels but no effect on the tensile strength of the samples. It is concluded that PCC behaves as both a processing aid and impact modifier in PVC-U formulations, and the reasons for this are discussed.

Funding

Solvay Advanced Functional Minerals and EPSRC

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Citation

FERNANDO, N.A.S. and THOMAS, N.L., 2012. Investigation of precipitated calcium carbonate as a processing aid and impact modifier in poly(vinyl chloride). Polymer Engineering and Science, 52 (11), pp. 2369 - 2374.

Publisher

John Wiley & Sons, Inc © Society of Plastics Engineers

Version

SMUR (Submitted Manuscript Under Review)

Publication date

2012

Notes

This article was published in the journal, Polymer Engineering and Science [© Society of Plastics Engineers] and the definitive version is available at: http://dx.doi.org/10.1002/pen.23191

ISSN

0032-3888

eISSN

1548-2634

Language

en

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Keywords

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