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Related Experiment Videos

Dynamic mechanical analysis of two crosslinked copolymer systems

K Tamareselvy1, F A Rueggeberg

  • 1Department of Oral Rehabilitation, Section of Dental Physical Sciences, Medical College of Georgia, School of Dentistry, Augusta 30912-1260, USA.

Dental Materials : Official Publication of the Academy of Dental Materials
|September 1, 1994
PubMed
Summary

Tailoring dental restorative polymers involves selecting monomers and crosslinkers. Adjusting pendent group length and crosslinker content influences dynamic mechanical properties and transition temperatures for optimal material performance.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Biomaterials Engineering

Background:

  • Dental restorative materials require specific mechanical properties.
  • Understanding copolymer behavior is crucial for material design.

Purpose of the Study:

  • Investigate dynamic mechanical properties of dental restorative copolymers.
  • Elucidate the influence of pendent group length and crosslinking agent on properties.

Main Methods:

  • Synthesized two copolymer systems (TMMA, TEEM) using varying molar fractions of MMA/EEM and TEGDMA.
  • Tested dynamic mechanical properties (storage modulus, loss factor) at 1Hz.
  • Determined transition temperatures using tan delta, phase angle, and loss factor.

Main Results:

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  • Pendent group length significantly impacted transition temperatures more than crosslinker content.
  • Increasing crosslinker content raised transition temperatures.
  • Analysis method influenced transition temperature values; loss factor analysis best elucidated sub-Tg transitions.

Conclusions:

  • Monomer structure and crosslinker content can be controlled to achieve desired physical and mechanical properties in restorative polymers.
  • This research provides insights for designing advanced dental restorative materials.