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Optimized Synthesis According to One-Step Process of a Biobased Thermoplastic Polyacetal Derived from Isosorbide
Nadia Hammami1,2, Nathalie Jarroux3, Mike Robitzer4
1Institut Charles Gerhardt, CC 1702, Place E. Bataillon, 34095 Montpellier, France. nadia.hammami@etu.umontpellier.fr.
Polymers
|April 13, 2019
Summary
Researchers synthesized a novel biobased polyacetal from isosorbide and methylene chloride. Synthesis conditions control polymer structure, yielding amorphous materials with a glass transition temperature of 55 °C.
Area of Science:
- Polymer Chemistry
- Materials Science
- Sustainable Polymers
Background:
- Isosorbide is a promising biobased monomer for polymer synthesis.
- Development of non-aromatic polyacetals is crucial for sustainable materials.
- Methylene chloride offers a reactive pathway for polyacetal formation.
Purpose of the Study:
- To synthesize and characterize a novel biobased, non-aromatic polyacetal.
- To investigate the influence of synthesis conditions on polymer properties.
- To evaluate the thermal and morphological characteristics of the resulting polymer.
Main Methods:
- One-step synthesis using isosorbide and methylene chloride in a benign solvent.
- Chemical composition analysis via Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared (FTIR) spectroscopy.
- Molecular weight determination using size exclusion chromatography (SEC) and MALDI-TOF spectrometry.
- Thermal properties assessed by thermogravimetry (TGA) and differential scanning calorimetry (DSC) for glass transition temperature (Tg).
Main Results:
- A biobased, non-aromatic polyacetal was successfully synthesized.
- Synthesis conditions, particularly mixing intensity and reactant stoichiometry, significantly impact polymer architecture (linear chains vs. macro-cycles) and yield.
- Linear chains formed under high mixing and excess methylene chloride resulted in an amorphous polymer with Tg around 55 °C.
- Thermogravimetric analysis indicated a degradation temperature near 215 °C.
Conclusions:
- The study demonstrates a facile and economical method for producing biobased polyacetals.
- Control over synthesis parameters allows tailoring of polymer structure and properties.
- The characterized polyacetal exhibits favorable thermal stability and a defined glass transition temperature, comparable to other isosorbide-based polymers.
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