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Related Concept Videos

Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...

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Preparation of Carbon Fiber and Bamboo Fiber Reinforced Poly (butylene Adipate-co-terephthalate) Foams by Supercritical Carbon Dioxide Foaming
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Design of a Low-Decomposition-Temperature Polyurethane Foam.

Nicholas M Marshall1, Gavin DeJong1, Connor Murrell2

  • 1University of South Carolina Aiken, Department of Chemistry, 471 University Parkway, Aiken, South Carolina 29801, United States.

ACS Omega
|July 3, 2026
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Summary

Researchers developed low-temperature degradable polyurethane foams using special polyols. Optimizing blowing agents, catalysts, and isocyanates significantly improved foam degradation for sustainable packaging solutions.

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • Polyurethane foams are widely used but pose waste challenges.
  • Developing degradable alternatives is crucial for sustainability.

Purpose of the Study:

  • To design and synthesize polyurethane foams with enhanced low-temperature degradation properties.
  • To investigate formulation factors influencing degradation performance.

Main Methods:

  • Incorporation of polypropylene carbonate polyols and novel low-temperature degradable polycarbonates.
  • Systematic variation of blowing agents (water/isocyanate ratios).
  • Evaluation of acid catalysts and aliphatic versus aromatic isocyanates.

Main Results:

  • Foams using typical water/MDI blowing agents exhibited poor degradation.
  • Minimizing water/isocyanate blowing agents significantly improved degradation.
  • Acid catalysts and aliphatic isocyanates further enhanced degradability.

Conclusions:

  • Formulation optimization is key to achieving effective low-temperature degradation in polyurethane foams.
  • These novel foams show promise for applications in low-waste and hazardous material packaging.