Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/24468
Title: Synthesis of biodegradable styrene copolymers
Authors: Gevers, Dries 
Kobben, Stephan 
Junkers, Tanja 
Copinet, Alain
Buntinx, Mieke 
Peeters, Roos 
Issue Date: 2017
Publisher: School of Engineering and Management Vaud (HEIG-VD)
Source: Wyser, Yve; Martine, Eric (Ed.). 28th IAPRI Symposium on Packaging 2017: Unlocking the full potential of packaging across the value-chain, School of Engineering and Management Vaud (HEIG-VD),p. 236-245
Abstract: Polystyrene (PS), a versatile polymer with many applications (e.g. packaging) representing about 10% of the total annual polymer consumption, shows practically no biodegradability. In this study a styrene (ST) based copolymer is synthesized and examined regarding its ability to degrade in a composting test. As second monomer, to introduce biodegradable ester groups, 5,6-benzo-2-metylene-dioxepane (BMDO) has been used in radical copolymerization reactions performed in inert and stirred 10 ml Schlenck bottles. The composition of the copolymers was measured by NMR.Their molecular weight (Mw) was done by GPC. Biodegradation was validated with a 4 months test in an aerated bioreactor by monitoring the CO2 production. In a typical copolymerization reaction 25 mol % of BMDO and 0,05 mol% dicumylperoxide (DCP) was added to styrene. Reaction was done during 24 hours at 120°C. The resulting copolymers contained 12 mol% ester groups and had a Mw of 115 000 g/mol. Copolymer reaction parameters are estimated at rBMDO = 0,52 and rST= 7,55. Time and temperature are indicated as important reaction parameters. Other parameters to be investigated are monomer concentrations, initiator and solvent. To validate the potential for biodegradation, 2 low Mw (23340 and 31060 g/mol) BMDO-ST copolymer with respectively 5,7 and 14,2 mol% BMDO were subjected to a 4 month composting resulting in a loss in weight of 21 and 27% respectively. This study showed a potential way to make polystyrene susceptible to biodegradation. In the follow-up study a comprehensive parameter study will be needed to obtain high Mw copolymers with sufficient ester groups incorporated to achieve biodegradation. The higher Mw material will be used to validate the material properties.
Keywords: biodegradation; polystyrene; copolymerization; BMDO; 5,6-benzo-2-methylene-dioxepane
Document URI: http://hdl.handle.net/1942/24468
ISBN: 9782839921206
Rights: (c) 2017 HEIG-VD, Yverdon-les-Bains, Switzerland
Category: C1
Type: Proceedings Paper
Appears in Collections:Research publications

Files in This Item:
File Description SizeFormat 
170509 28th IAPRI Symposium 2017_GEVERS et al.pdf
  Restricted Access
N/A603.66 kBAdobe PDFView/Open    Request a copy
170511 28th IAPRI Symposium on Packaging - accepted abstract - oral.pdf
  Restricted Access
Bewijs van peer-review86.27 kBAdobe PDFView/Open    Request a copy
Show full item record

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.