Polylactic acid physical properties

Tawakkal, 1. S. M. A., Talib, R. A., Abdan, K., and Ling, C. N. (2012). Mechanical and physical properties of kenaf-derived cellulose (KDC)-filled polylactic acid (PLA) composites. Bioresmirces. 1,1643-1655. 

Natural polymers such as starch and protein are potential alternatives to petroleum-based polymers for a number of applications. Unfortunately, their high solubility in water limit their use for water sensitive applications. To solve this problem thermoplastic starches have been laminated using water-resistant, biodegradable polymers. For example, polylactic acid and P(3HB-co-3HV) were utilised as the outer layers of the stratified polyester/PWS (plasticized wheat starch)/polyester film strucmre in order to improve the mechanical properties and water resistance of PWS which made it useful for food packaging and disposable articles [65]. Moreover, improved physic-chemical interactions between P(3HB-CO-3HV) and wheat straw fibres were achieved with high temperature treatment. It resulted in increased P(3HB-co-3HV) crystallization, increased Young s moduli and lowered values of stress and strain to break than the neat matrix of P(3HB-co-3HV). There was no difference in the biodegradation rate of the polymer [66]. 

Polymers Polyglycolic acid, polylactic acid, poly(orthoesters), polyethylene glycol, poly-lactic-co-glycohc acid, polyurethane, and poly-e-caprolactone Tunable properties (physical, chemical, and biological) to match the requirements of specific applications Ulery et al. (2011), Maitz (2015), and Rashidi et al. (2014)... 

We felt that the physicochemical properties of the polymer might therefore be manipulated to alter the cell shape and thus the cell physiology. We next studied the effects of polymers of different physical and chemical configuration on cell attachment, viability and performance of differentiated function. The ability of the hepatocyte to maintain differentiated function was assessed by Ae rate of albumin secretion. We found that a suitable polymer was an uncoated 85 15 combination of polylactic/polyglycolic acid. This suggested to us that a... 

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