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Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in PolyS-Divinylbenzene

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Bitumen Binders Modified with Sulfur/Organic Copolymers.

Jakub Wręczycki¹, Yuriy Demchuk², Dariusz M Bieliński¹

¹Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, 16 Stefanowskiego Street, 90-537 Lodz, Poland.

Materials (Basel, Switzerland)

|March 10, 2022

Summary

This summary is machine-generated.

Waste sulfur from petroleum refining can be used to create novel sulfur/organic copolymers. These copolymers enhance bitumen binder performance, improving temperature stability, resistance to permanent deformation, and adhesion to surfaces.

Keywords:

inverse vulcanization polymer-modified bitumen polysulfides sulfur polymers

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Published on: May 1, 2016

Area of Science:

Materials Science
Polymer Chemistry
Petroleum Engineering

Background:

Growing waste sulfur from petroleum processes necessitates sustainable utilization strategies.
Elemental sulfur is used in bitumen modification, but sulfur-containing high-molecular compounds have limited application.
Novel modifiers are needed to improve bitumen binder properties for various applications.

Purpose of the Study:

To explore the use of sulfur/organic copolymers, synthesized via inverse vulcanization, as modifiers for bitumen binders.
To characterize the synthesized polysulfides and evaluate the performance of modified bitumen binders.
To investigate the interaction between bitumen and the sulfur/organic modifiers.

Main Methods:

Synthesis of sulfur/organic copolymers from elemental sulfur (S₈) and unsaturated organic species (dicyclopentadiene, styrene, limonene).
Thermal characterization using Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC).
Mechanical performance testing of modified bitumen binders (softening point, ductility, penetration, adhesion) and FTIR spectroscopy for interaction studies.

Main Results:

Modified bitumen binders exhibited improved temperature sensitivity (softening point increased up to 7 °C) and resistance to permanent deformation (lower penetration depth).
Significant enhancement in bitumen adhesion to glass (25% to 87%) and gravel surfaces was observed.
Modified binders showed increased resistance to aging without compromising low-temperature performance, indicating more elastic behavior.

Conclusions:

Sulfur/organic copolymers derived from waste sulfur offer a viable and beneficial route for modifying bitumen binders.
The novel modifiers impart superior thermal stability, mechanical properties, and adhesion, addressing key performance limitations of conventional bitumen.
This approach presents an environmentally sound method for valorizing industrial waste sulfur into high-performance materials.