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New Segmented Poly(Thiourethane-Urethane)s Based on Poly(ε-Caprolactone)Diol Soft Segment: Synthesis and

Andrzej Puszka1, Janusz W Sikora2

  • 1Department of Polymer Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University in Lublin, Gliniana 33, 20-614 Lublin, Poland.

Materials (Basel, Switzerland)
|July 27, 2022
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Summary

New segmented poly(thiourethane-urethane)s (SPTURs) were synthesized using a novel chain extender. These transparent polymers exhibit high molar mass, good hydrolysis resistance, and excellent mechanical and adhesive properties.

Keywords:
differential scanning calorimetrymechanical propertiesoptical propertiespoly(ε-caprolactone)diolsurface free energythermoplastic polyurethanestransparent polyurethanes

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Area of Science:

  • Polymer Chemistry
  • Materials Science

Background:

  • Development of novel polymers with enhanced properties is crucial for advanced applications.
  • Segmented poly(thiourethane-urethane)s (SPTURs) offer a versatile platform for material design.

Purpose of the Study:

  • To synthesize new segmented poly(thiourethane-urethane)s (SPTURs) using a nonconventional polymer chain extender.
  • To characterize the structural, thermal, mechanical, adhesive, and surface properties of the synthesized SPTURs.

Main Methods:

  • Synthesis of SPTURs via reaction of 1,1'-methanediylbis(4-isocyanatocyclohexane) (HMDI) and poly(ε-caprolactone)diol (PCL) with a novel thiol.
  • Characterization using FTIR, GPC, DSC, TGA, DMTA, contact angle measurements, and mechanical testing.

Main Results:

  • Successfully synthesized transparent or partially transparent SPTURs with high molar masses (up to 84,300 Da).
  • Demonstrated good resistance to hydrolysis and excellent mechanical properties, including tensile strength up to 43.26 MPa and adhesion to copper of 14.66 MPa.
  • Characterized hydrophilic surfaces with water contact angles between 64.07° and 73.12° and surface free energy up to 46.69 mN/m.

Conclusions:

  • The novel SPTURs possess a unique combination of high molar mass, transparency, hydrolysis resistance, and favorable mechanical and surface properties.
  • These findings suggest potential applications for these new polymers in various fields requiring advanced material performance.