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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2010

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Compositional, physical and chemical modification of polylactide

Żenkiewicz M., Rytlewski P., Malinowski R.

Journal of Achievements in Materials and Manufacturing Engineering

2010

Vol. 43, nr 1

192-199

The purpose of this article was to review some of the modification methods applied to improve mechanical, barrier and/or surface properties of polylactide (PLA). Design/methodology/approach: The presented modification methods were classified into three groups due to the dominant role of compositional, physical or chemical factor effecting the most PLA properties. Findings: It was found that incorporation of small amounts of montmorillonite up to 5% leads to formation of a nanocomposite with enhanced tensile strength and improved barrier properties. Corona treatment of pure PLA and PLA contained MMT nanofiller causes a significant decrease in the water contact angle and does not essentially affect the diiodomethane contact angle. This treatment leads to an increase in surface free energy that is much more significant for pure PLA than for PLA containing MMT nanofiller. It was also found that with increasing number up to 1000 of laser pulses of energies 5 mJ/cm2 an increase in surface free energy was observed, while the next laser pulses caused decrease of this energy. The determination and comparison of the influence of 3 wt.% of trimethylopropane trimethacylate (TMPTA) and 3 wt.% of trially isocyanurate (TAIC) crosslinking agents on the thermomechanical properties of electron beam irradiated PLA was reported. Research limitations/implications: A number of various modification methods are widely reported in literature. In this article a review of only such modification methods is presented, which are in line with the newest trends in polymer industry and science. Practical implications: There are a number of PLA properties, which need to be improved to satisfy specific application conditions. For that reasons researches are leading to find suitable modification methods to improve selected properties of PLA. Originality/value: This article presents some of modification methods, which are in line with the newest trends in polymer industry and science.