bioplasticsMAGAZINE_0901

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Basics Table 1: Properties of PLA Types Type T m T g σ n E b PLLA 160-180 °C 55-65 °C 45-55 Mpa 3-5 % PL / DLA 55 °C 50-200 % sc PLA 220-230 °C 60 °C 3-5 % sbc PLA 185-195 °C 55 °C 5-10 % T m - melting temperature T g - glass transition temperature E b - elongation at break σ n - tensile strength at break lactide with small contents of meso-lactide a co-polymer is formed. Increasing meso-lactide leads to decreasing crystallinity. With more than 10-15% meso-lactide the polymer is amorphous. By varying the amount of meso-lactide the properties of the polymer can be adjusted for specific applications. One of the reasons for the limited consumption of PLA up to now is the low thermal resistance. The Tg (glass transition temperature) is about 55°C depending on comonomer content to a small extent (Table 1). Methods of improving thermal resistance are to prepare a stereo complex (sc PLA) or a stereo-block copolymer (sbc PLA). Melting point and heat distortion temperature (HDT) will increase significantly. Improving the thermal properties can extend the applications of PLA considerably in the future. There are also various additives that improve the properties of PLA with respect to impact strength, melt viscosity, HDT, crystallinity etc. Perspective PLA combines all prerequisites of sustainability with important properties of well established polymers. Applications have already been found in many niches of packaging and textile products. Within those niches fast growth of consumption is expected to continue depending on the availability of PLA polymer. High research activity is dedicated to overcome typical weaknesses of PLA – low impact strength and low heat distortion temperature – and to develop tailor-made PLA grades in order to serve special applications. These activities will conquer new niches for PLA and will help to increase PLA consumption at high velocity. Other growth factors are the availability and prices of crude oil, agricultural products and production plants and technology. Within the foreseeable future PLA will not become a commodity polymer like PE, PP, PS – this is considered to be an advantage both for PLA producers and converters. However, this could change in the long term. www.thyssenkrupp.com *: The article is based on a contribution to a book, submitted for publication in T. Haas, M. Kircher, T. Köhler, G. Wich, U. Schörken, R. Hagen, White Biotechnology, in R. Höfer, Ed., Sustainable solutions for modern economies, The Royal Society of Chemistry, Cambridge, forthcoming 2009, ISBN 9781847559050. 40 bioplastics MAGAZINE [01/09] Vol. 4
Pland Paper ® ( PLA and Paper ) means PLA coated on paper with no additives. This eco-friendly paper is made from all renewable materials and carried the same characters just like PE coated paper. Food Containers made from this paper are safe to load hot coffee and soup, because Pland Paper ® is all Nature made. For more information, please visit www.plandpaper.com or contact sales@plandpaper.com Pland Paper WeiMon Industry Co., Ltd. - 2F, No.57, Singjhong Rd., NeiHu, District, Taipei City 114, Taiwan, R.O.C. Environmental Materials Division TEL: +886-2-27953131 ext. 142
Page 1 and 2: ioplastics magazine Vol. 4 ISSN 186
Page 3 and 4: Editorial dear readers I’m sure t
Page 5 and 6: Cosun and Avantium announce collabo
Page 7 and 8: Use of Oxo-Additives implicates los
Page 9 and 10: Best Bioplastics Application - Pack
Page 11 and 12: Del Gusto Resources Emissions THE B
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Page 15 and 16: Automotive use in luggage-trim upho
Page 17 and 18: T H E I N T E R N AT I O N A L P L
Page 19 and 20: Materials SULZER “The process con
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Page 23 and 24: Foam In addition, until recently, P
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Page 27 and 28: Application News In-Mould- Decorate
Page 29 and 30: Politics Sorting through Facts and
Page 31 and 32: Politics % C conversion to CO 2 (%
Page 33 and 34: Politics LCA results are increasing
Page 35 and 36: Mark your calendar ! 2 nd PLA Bottl
Page 37 and 38: From Science & Research low cost an
Page 39: Basics feedstock (Fig. 2). Conseque
Page 43 and 44: Politics Fig 3: membership cards Fi
Page 45 and 46: Events February 25-27, 2009 GPEC (G
Page 47 and 48: Basics Readers who know better expl
Page 49 and 50: NOVAMONT S.p.A. Via Fauser , 8 2810
Page 52: A real sign of sustainable developm

bioplasticsMAGAZINE_0901

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