Flow and Die-Swell Behavior in Extrusion of PLLA Melts

Feng Jiao Li; Ji Zhao Liang; Bo Zhu; Ke Jian Wang

doi:10.4028/www.scientific.net/AMR.1051.156

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1051Flow and Die-Swell Behavior in Extrusion of PLLA...

Flow and Die-Swell Behavior in Extrusion of PLLA Melts

Abstract:

The rheological properties of two kinds of poly (L-lactic acid) melts (AI-1001 and 4032D) have been investigated using a melt flow indexer within the temperature range from 170 to 190 and load varying from 2.16 to 12.5 kg. It was found that the melt volume flow rate (MVR) and extrudate swell ratios (B) increased non-linearly with increasing load when the temperature was constant; the MVR increased while the B decreased with a rise in temperature for both the AI-1001 and 4032D melts; the relationship between the MVR and temperature obeyed expression like as the Arrhenius equation when the load was fixed. Under the same test conditions, the values of the MVR and B of the AI-1001 melt were higher than those of the 4032D melt, and the sensitivity of the MVR and B to the load for the former is higher than those for the latter.

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Periodical:

Advanced Materials Research (Volume 1051)

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156-161

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1051.156

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Online since:

October 2014

Authors:

Feng Jiao Li*, Ji Zhao Liang, Bo Zhu, Ke Jian Wang

Keywords:

Biopolymer, Extrudate Swell, Flow Properties, Melt Extrusion

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