Structure and thermal properties of poly(lactic acid)/cellulose whiskers nanocomposite materials

2007 ◽  
Vol 67 (11-12) ◽  
pp. 2535-2544 ◽  
Author(s):  
L. Petersson ◽  
I. Kvien ◽  
K. Oksman
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Nanocomposite Materials ◽  
Poly Lactic Acid ◽  
Cellulose Whiskers

Influence of extrusion screw speed on the properties of halloysite nanotube impregnated polylactic acid nanocomposites

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chaitra Venkatesh ◽  
Yuanyuan Chen ◽  
Zhi Cao ◽  
Shane Brennan ◽  
Ian Major ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Thermal Properties ◽  
Composite Films ◽  
Polymer Melt ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Screw Speed ◽  
Halloysite Nanotube ◽  
The Past

Abstract Poly (lactic acid)/halloysite nanotube (PLA/HNT) nanocomposites have been studied extensively over the past few years owing to the interesting properties of the polymer, PLA, and the nanoclay, HNT, individually and as composites. In this paper, the influence of the screw speed during extrusion was investigated and was found to have a significant impact on the mechanical and thermal performance of the extruded PLA/HNT nanocomposites. To determine the effect of screw speed on PLA/HNT nanocomposites, 5 and 10 wt% of HNTs were blended into the PLA matrix through compounding at screw speeds of 40, 80, and 140 rpm. Virgin PLA was compounded for comparison. The resultant polymer melt was quench cooled onto a calendar system to produce composite films which were assessed for mechanical, thermal, chemical, and surface properties. Results illustrate that in comparison to 40 and 80 rpm, the virgin PLA when compounded at 140 rpm, indicated a significant increase in the mechanical properties. The PLA/HNT 5 wt% nanocomposite compounded at 140 rpm showed significant improvement in the dispersion of HNTs in the PLA matrix which in turn enhanced the mechanical and thermal properties. This can be attributed to the increased melt shear at higher screw speeds.

scholarly journals Thermal Properties, Crystallinity, and Oxygen Permeability of Na-montmorillonite Reinforced Plasticized Poly(lactic acid) Film

2016 ◽  
Vol 20 (1) ◽  
pp. 1
Author(s):  
Kurniawan Yuniarto ◽  
Yohanes Aris Purwanto ◽  
Setyo Purwanto ◽  
Bruce A. Welt ◽  
Hadi Karia Purwadaria ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Oxygen Permeability ◽  
Poly Lactic Acid

Thermal Properties of Poly(Lactic Acid)

2019 ◽  
pp. 97-133
Author(s):  
Lee Tin Sin ◽  
Bee Soo Tueen
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Poly Lactic Acid

Preparation and Characterization of Micro-Graphite Filled Poly(Lactic Acid) Composites: Part 1 - Rheological and Thermal Properties

2020 ◽  
Vol 981 ◽  
pp. 138-143
Author(s):  
Esa N. Shohih ◽  
Mujtahid Kaavessina ◽  
Henry A. S. Lomi ◽  
Betha P. Pratiwi ◽  
Sperisa Distantina ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Lactic Acid ◽  
Thermal Properties ◽  
Conductive Polymer ◽  
Complex Viscosity ◽  
Poly Lactic Acid ◽  
Homogeneous Distribution ◽  
Mechanical And Thermal Properties ◽  
Blending Method ◽  
Stirring Time

Conductive polymer composites (CPCs) have attracted great attention of researchers due to their enhanced properties such as an adjustable electrical conductivity, good processability, good mechanical and thermal properties, etc. CPCs had many potencies for wider application in electronic devices. Poly (lactic acid) or PLA is one of the interesting polymers used in the developing of these new important materials. PLA properties are comparable to the synthetic petroleum-based polymers such as polyethylene terephthalate (PET), polypropylene (PP), etc. This research focuses on studying the rheological and thermal properties of PLA/micro-graphite as a conductive polymer composite which adjustable its electrical conductivity. In this study, the PLA/micro-graphite was prepared through solvent blending method using chloroform. The micro-graphite composition was varied from 0%, 5%, and 10 % (w/w) with different stirring time (30 and 60 minutes) and then, poured in glass mould. In the melt rheology study, the frequency sweep test showed that the complex viscosity (|η*|) of the bio-composite increased with the micro-graphite loading. The same tendency was also found in thermal property and stability. The melting temperature and thermal degradation were slightly increasing. The crystallinity of PLA was influenced by the presence of micro-graphite. In this solvent blending method, the homogeneous distribution of micro-graphite in the bio-composite required at least 60 minutes (stirred at 650 rpm and 60 °C).

Effect of a phosphorus-containing flame retardant on the thermal properties and ease of ignition of poly(lactic acid)

2011 ◽  
Vol 96 (9) ◽  
pp. 1557-1561 ◽  
Author(s):  
Lian-Lian Wei ◽  
De-Yi Wang ◽  
Hong-Bing Chen ◽  
Li Chen ◽  
Xiu-Li Wang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Flame Retardant ◽  
Poly Lactic Acid ◽  
Phosphorus Containing
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