Designing green plasticizers: Influence of molecule geometry
Designing green plasticizers: Influence of molecule geometry and alkyl chain length on the plasticizing effectiveness of diester plasticizers in PVC blends - ScienceDirect Polymer Volume 89, 20 April 2016, Pages 18-27
Designing green plasticizers: Influence of alkyl chain length
In this work, we present data demonstrating the influence of structural characteristics on plasticizing as well as biodegradation properties of various succinate-based plasticizers. Alkyl chain length was varied either by altering the alcohol used or the central diacid leading to several series of homologous compounds. 2. Materials and methods2.1.
Designing green plasticizers: influence of alkyl chain length
Designing green plasticizers: influence of alkyl chain length on biodegradation and plasticization properties of succinate based plasticizers Phthalate diesters such as di (2-ethylhexyl) phthalate (DEHP) are considered ubiquitous contaminants and are poorly biodegraded in the environment.
Designing greener plasticizers: Effects of alkyl chain length
Earlier work had identified the diester di (2-ethylhexyl) maleate (DEHM) as a potential greener candidate plasticizer to replace DEHP, yet its biodegradation rate was reported to be slow. In this study, we modified the side chains of maleate diesters to be linear (i.e., unbranched) alkyl chains that varied in length from ethyl to n-octyl.
[PDF] Designing green plasticizers: influence of molecular
Designing green plasticizers: influence of alkyl chain length on biodegradation and plasticization properties of succinate based plasticizers. H. C. Erythropel, Patrick Dodd, R. Leask, M. Maríc, D. Cooper
- How does size affect the performance of plasticizer candidates?
- The performance of the plasticizer candidates improved with increasing size, from the smallest compounds (C2 side chains) to the dihexyl compounds (C6 side chains), and then decreased slightly for the longest molecules (C8 side chains).
- Why do succinates and maleates have longer side chains?
- When the side chain length is increased, which occurs on both sides of the diester, more non-polar groups are added to both sides of the molecule, which in turn can disrupt more PVC chain–chain interactions. This explains the increased plasticizer effectiveness of the succinates and maleates with longer side chains.
- Can maleate plasticizers replace phthalate-based plasticizer?
- Overall, it was shown that in terms of Tg reduction and biodegradation, maleate plasticizers have the potential to substitute phthalate-based plasticizers by changing the side chains from branched to straight aliphatic chains.
- What are plasticizers & how do they work?
- Plasticizers are typically relatively small molecules that are incorporated into polymeric materials in order to increase the workability, flexibility, or distensibility of the matrix polymer .
- Can plasticizers be biodegraded?
- Biodegradation experiments of the pure plasticizers were done with the common soil bacterium R. rhodocrous, which is known to be able to degrade a wide range of hydrophobic, organic compounds ( Jones and Goodfellow, 2012 ).
