Using milk industry waste in production of biodegradable polymers

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Using milk industry waste in production of biodegradable polymers

Journal Title: CHEMIK nauka-technika-rynek - Year 2014, Vol 68, Issue 8

Abstract

The main direction of whey processing is production of lactic acid in the process of lactic fermentation. Lactic acid can be used to produce fully biodegradable polymer [poly(lactic acid)] (PLA), in the process of direct polymerization, directly from lactic acid, and in indirect polymerization. This study reviews the literature comparing various methods of PLA synthesis and potential uses of this polymer. The impact of physical parameters on the average molecular weight (Mw), glassy temperature (Tg), flow temperature (Tp) for amorphous PLA during polymerization, and melting point (Tm) for crystalline PLA is presented. Under our own research zinc (Zn), tin (Sn) and zirconium (Zr) based catalysts were tested in the polymerization process, with opening of lactide ring obtained from condensation of two lactic acid molecules and direct polycondensation of lactic acid.

Authors and Affiliations

S. Maślanka, M. Siołek, Ł. Hamryszak, D. Łopot

Keywords

Structural and electron aspects of nitrogen–nitrogen bond

Nitrogen, like many other chemical elements, has catenation ability. The largest family of compounds containing Nx systems are compounds containing two nitrogen atoms, and the most numerous among them are hydrazo, azo...

Zastosowanie metody oceny cyklu życia (LCA) do oszacowania wpływu na środowisko procesu uprawy biomasy przeznaczonej na cele energetyczne

Środowiskowa ocena cyklu życia (LCA – Life Cycle Assessment) w Polsce pozostaje wciąż jeszcze stosunkowo nową metodą szacowania wpływu na środowisko procesów produkcyjnych. Głównym celem analizy jest efektywne zarządzani...

EP ID EP157984
DOI -
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