ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Polymer composite samples consisting of L-Lactic acid (LA) was reacted by ring-openingpolymerization with aluminum triflate as a catalyst, glycerol as an initiator and various particles asfillers. Cellulose particles, kaolin and silica gel with different particle sizes were employed as fillers.Filler content was varied 0 to 100 wt% as ratio of filler weight to PLA weight. L-Lactide (L-LA),aluminum triflate as catalyst, glycerol as an initiator and particles were mixed at room temperatureand then were put into plastic tubes. The mixture in tubes was heated and reacted at 100 oC for 6hours. The samples were removed from tubes after cooling and were cut into the column shapespecimen with diameter of 10 mm and ca. 10 mm height. By the above procedure, particles could bemixed to poly(lactic acid) (PLA) matrix easily and homogeneously. The molecular weight andmolecular weight distribution of PLA matrix were determined by gel permeation chromatography(GPC). Apparent density of composite samples was calculated by using weight and sizes of columnshape specimens. The mechanical properties such as elastic modulus and strength were investigatedby compression tests using column shape specimens. Molecular weight and molecular weightdistribution were almost constant for all the samples with and without particles. Elastic modulus andcompression strength were improved by particles. For the cellulose particles filled samples, thehighest values of elastic modulus and compression strength were derived at filler content of around 20vol%. The influences of sizes and types of particles on the physical properties such as molecularweight, density and mechanical properties were investigated
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.334-335.1157.pdf
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