Novel Simple Approach for Production of Elastic Poly(propylene carbonate)

Area of Science:

• Polymer Science
• Materials Science
• Organic Chemistry

Background:

• Atactic poly(propylene carbonate) (PPC) is synthesized via ring-opening copolymerization of propylene oxide and CO2.
• The material's properties are influenced by its molecular weight (Mn = 71.4 kDa) and polydispersity (ĐM = 1.86).

Purpose of the Study:

• To investigate the effect of hot pressing temperature on the elastic properties of atactic PPC.
• To explore the potential of PPC for shape memory applications.

Main Methods:

• Synthesis of atactic PPC using a cobalt(III) salen complex catalyst.
• Hot pressing of PPC at temperatures ranging from 110 to 140 °C.
• Thermomechanical analysis to evaluate material properties.

Main Results:

• Hot pressing induced the release of propylene carbonate (PC), lowering the glass transition temperature from 39.4 to 26.1 °C.
• Increasing pressing temperature from 110 to 140 °C reduced elastic modulus and yield strength while increasing tensile elongation.
• Significant, reversible deformations were observed, indicating shape memory potential.

Conclusions:

• Hot pressing temperature is a critical factor in tuning the elastic properties of PPC.
• PPC exhibits promising characteristics for the development of novel shape memory materials.