scholarly journals Sustainable Polymers Square Table

2021 ◽  
Vol 54 (18) ◽  
pp. 8257-8258
Author(s):  
Juan de Pablo ◽  
Marc A. Hillmyer
Keyword(s):  
Sustainable Polymers

scholarly journals Lifetime predictions of non-ionic and ionic biopolymers: kinetic studies by non-isothermal thermogravimetric analysis

2021 ◽  
Author(s):  
Martina Maria Calvino ◽  
Lorenzo Lisuzzo ◽  
Giuseppe Cavallaro ◽  
Giuseppe Lazzara ◽  
Stefana Milioto
Keyword(s):  
Degradation Kinetics ◽  
Kinetic Studies ◽  
Ionic Polymers ◽  
Heating Rates ◽  
Exponential Factor ◽  
Master Plot ◽  
Plot Analysis ◽  
Sustainable Polymers ◽  
Master Plot Analysis

AbstractIn this paper, films based on sustainable polymers with variable charge have been investigated by non-isothermal thermogravimetry in order to predict their lifetime, which is a key parameter for their potential use in numerous technological and biomedical applications. Specifically, chitosan has been selected as positively charged biopolymer, while alginate has been chosen as negatively charged biopolymer. Among non-ionic polymers, methylcellulose has been investigated. Thermogravimetric measurements at variable heating rates (5, 10, 15 and 20 °C min−1) have been performed for all the polymers to study their degradation kinetics by using isoconversional procedures combined with ‘Master plot’ analyses. Both integral (KAS and Starink methods) and differential (Friedman method) isoconversional procedures have shown that chitosan possesses the highest energetic barrier to decomposition. Based on the Master plot analysis, the decomposition of ionic polymers can be described by the R2 kinetic model (contracted cylindrical geometry), while the degradation of methylcellulose reflects the D2 mechanism (two-dimensional diffusion). The determination of both the decomposition mechanism and the kinetic parameters (activation energy and pre-exponential factor) has been used to determine the decay time functions of the several biopolymers. The obtained insights can be helpful for the development of durable films based on sustainable polymers with variable electrostatic characteristics. Graphical abstract

Sustainable Polymers from Renewable Resources: Polymer Blends of Furan-Based Polyesters

2018 ◽  
Vol 303 (8) ◽  
pp. 1800153 ◽  
Author(s):  
Niki Poulopoulou ◽  
Nejib Kasmi ◽  
Dimitrios N. Bikiaris ◽  
Dimitrios G. Papageorgiou ◽  
George Floudas ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Renewable Resources ◽  
Sustainable Polymers

Access to high-molecular-weight poly(γ-butyrolactone) by simple commercial catalysts

2021 ◽  
Author(s):  
Yihuan Liu ◽  
Xin Yuan ◽  
Jiaqi Wu ◽  
Xin Hu ◽  
Ning Zhu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Sustainable Polymers ◽  
High Molecular Weight Poly

The emerging poly(γ-butyrolactone) (PGBL) represents a significant branch of sustainable polymers that exhibits full chemical recyclability. However, it is a great challenge to synthesis high-molecular-weight PGBL. Herein, we present the...

Two steps to sustainable polymers

2021 ◽  
Author(s):  
Shaafique Chowdhury ◽  
Pamela Peralta-Yahya
Keyword(s):  
Sustainable Polymers
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