Thermal and hydrolytic degradation kinetics of PLA in the molten state

Speranza, Vito; Meo, Annarita De; Pantani, Roberto

doi:10.1016/j.polymdegradstab.2013.12.031

Cited by 119 publications

(68 citation statements)

References 18 publications

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“…The cell was here adopted just to squeeze the pellets into films, exploiting its very accurate control of the thermal history and the possibility of keeping a dry environment to prevent any degradation [9].…”

Section: Methodsmentioning

confidence: 99%

A spectroscopic approach to assess transport properties of water vapor in PLA

2015

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Section: Methodsmentioning

confidence: 99%

A spectroscopic approach to assess transport properties of water vapor in PLA

2015

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“…This assumption is often used in such kind of models [2,4,5,8,10,23]. Therefore, the following expression describes the time dependent zero shear viscosity: …”

Section: Modeling the Viscosity Changesmentioning

confidence: 99%

Rheological study of the reaction kinetics in a poly(ethylene terephthalate) melt

Härth¹,

Kaschta²,

Schubert³

2015

Polymer Degradation and Stability

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“…1. It is worth pointing out that PLA presents a very narrow processing window: the injection temperature is limited in the range 180-220°C due to the high viscosity and the sensitivity to thermal degradation [6]; the mold temperature is limited by the relatively low glass transition temperature (55-60°C). A masterbatch containing 30% by weight of talc was prepared by means of a Brabender extruder working at a temperature of 200°C.…”

Section: Methodsmentioning

confidence: 99%

Foam injection molding of poly(lactic acid) with physical blowing agents

Pantani

Sorrentino

Volpe

et al. 2014

AIP Conference Proceedings

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Foam injection molding uses environmental friendly blowing agents under high pressure and temperature to produce parts having a cellular core and a compact solid skin (the so-called "structural foam"). The addition of a supercritical gas reduces the part weight and at the same time improves some physical properties of the material through the promotion of a faster crystallization; it also leads to the reduction of both the viscosity and the glass transition temperature of the polymer melt, which therefore can be injection molded adopting lower temperatures and pressures. These aspects are of extreme interest for biodegradable polymers, which often present a very narrow processing window, with the suitable processing temperatures close to the degradation conditions. In this work, foam injection molding was carried out by an instrumented molding machine, able to measure the pressure evolution in different positions along the flow-path. The material adopted was a biodegradable polymer, namely the Poly(lactic acid), PLA. The effect of a physical blowing agent (PBA) on the viscosity was measured. The density reduction and the morphology of parts obtained by different molding conditions was assessed.[[

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Thermal and hydrolytic degradation kinetics of PLA in the molten state

Cited by 119 publications

References 18 publications

A spectroscopic approach to assess transport properties of water vapor in PLA

A spectroscopic approach to assess transport properties of water vapor in PLA

Rheological study of the reaction kinetics in a poly(ethylene terephthalate) melt

Foam injection molding of poly(lactic acid) with physical blowing agents

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