Samuel J. Tonkin

ORCID: 0009-0009-2947-0763
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About
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Research Areas
  • Synthesis and properties of polymers
  • Tribology and Wear Analysis
  • Silicone and Siloxane Chemistry
  • Semiconductor Lasers and Optical Devices
  • Surface Modification and Superhydrophobicity
  • Synthetic Organic Chemistry Methods
  • Advanced Sensor and Energy Harvesting Materials
  • Epoxy Resin Curing Processes
  • Photonic and Optical Devices
  • Polymer Nanocomposites and Properties
  • Pelvic and Acetabular Injuries
  • Dielectric materials and actuators
  • Nanofabrication and Lithography Techniques
  • Catalysis and Hydrodesulfurization Studies
  • Organic Electronics and Photovoltaics
  • Spinal Fractures and Fixation Techniques
  • Polymer composites and self-healing
  • Hip and Femur Fractures
  • Chemistry and Chemical Engineering
  • Chemical Synthesis and Reactions
  • Advanced Fiber Optic Sensors

Flinders University
2020-2025

Heartlands Hospital
2012

Inverse vulcanized polymer materials have received considerable attention as a way to use sulfur, an industrial byproduct, starting material for synthesis. The resulting high-sulfur content polymers also been investigated because their properties give rise promising applications such infrared imaging, energy storage, and heavy metal capture due unique structure. However, synthesis of flexible sulfur network which shows good mechanical combining high strength, elongation, toughness is still...

10.1021/acs.chemmater.1c03662 article EN cc-by Chemistry of Materials 2022-01-19

Polymers made by inverse vulcanization can be assembled, repaired, and recycled at room temperature through nucleophile-catalyzed S–S metathesis.

10.1039/d0sc00855a article EN cc-by Chemical Science 2020-01-01

Inverse vulcanization provides dynamic and responsive materials made from elemental sulfur unsaturated cross-linkers. These polymers have been used in a variety of applications such as energy storage, infrared optics, repairable materials, environmental remediation, precision fertilizers. In spite these advances, there is need for methods to recycle reprocess polymers. this study, prepared by inverse are shown undergo reactive compression molding. process, the interfaces brought into contact...

10.1002/chem.202001841 article EN Chemistry - A European Journal 2020-05-19

Abstract With increasing use of infrared imaging in medical diagnostics, military and civilian surveillance, navigation autonomous vehicles, there is a need for low‐cost alternatives to traditional materials used optics such as germanium. Sulfur‐rich copolymers hold promise, they are made from feedstocks have high refractive index. In this report, cyclopentadiene copolymerized with sulfur provide plastic the highest long‐wave transparency reported date class materials. Diverse lens...

10.1002/adom.202300058 article EN cc-by Advanced Optical Materials 2023-05-24

Sulfur-sulfur bonds are ubiquitous across broad classes of natural products, peptides and proteins, drug molecules, synthetic polymers materials. The ability to make break these in a controlled manner is critical for their many scientific technological applications. In this study, we report the discovery new unusual S-S metathesis reaction linear organic trisulfides. When exposed certain polar aprotic solvents, trisulfides were found undergo spontaneous metathesis, with equilibrium...

10.26434/chemrxiv-2025-fnhdd preprint EN cc-by 2025-03-07

A copolymer made from sulfur and dicyclopentadiene was useful as a mercury sorbent, also protective repairable coating.

10.1039/d1py01416a article EN Polymer Chemistry 2021-12-09

Abstract The modification of polymer surfaces using laser light is important for many applications in the nano‐, bio‐ and chemical sciences. Such capabilities have supported advances biomedical devices, electronics, information storage, microfluidics, other applications. In most cases, these modifications require high power lasers that are expensive specialized equipment facilities to minimize risk hazardous radiation. Additionally, systems can be easily modified by often complex costly...

10.1002/anie.202404802 article EN cc-by Angewandte Chemie International Edition 2024-03-19

A magnetic responsive composite was made from a sulfur-rich polymer and iron nanoparticles. Diverse applications in mercury remediation, microwave curing, actuators were demonstrated.

10.1039/d2py00903j article EN Polymer Chemistry 2022-01-01

Abstract A polysulfide terpolymer made from canola oil, dicyclopentadiene, and elemental sulfur is synthesized evaluated as bulk structural material. The unique structure in this material allows the two polymer blocks to be bonded together through amine‐catalyzed SS metathesis. No exogenous adhesive required: both mortar. strength of joined polymers by a series shear tests compared bond obtained with commercially available superglue. adhesion via metathesis stronger all tests. To improve...

10.1002/macp.202100333 article EN Macromolecular Chemistry and Physics 2021-11-17

Abstract The modification of polymer surfaces using laser light is important for many applications in the nano‐, bio‐ and chemical sciences. Such capabilities have supported advances biomedical devices, electronics, information storage, microfluidics, other applications. In most cases, these modifications require high power lasers that are expensive specialized equipment facilities to minimize risk hazardous radiation. Additionally, systems can be easily modified by often complex costly...

10.1002/ange.202404802 article EN cc-by Angewandte Chemie 2024-03-19

Fueled by big data and artificial intelligence, data-centric innovations are expected to rise exponentially in the near future. This change demands rapid advancement alternative storage solutions material platforms. Probe-based storage, such as mechanical using an atomic force microscope tip, offers a way forward achieves high-density exceeding 4 Tb/in², surpassing hard disks. However, medium must be modifiable erasable on nanoscale. While polymers highly promising, they face challenges with...

10.26434/chemrxiv-2024-bzds5 preprint EN cc-by-nc 2024-07-30

With increasing use of infrared imaging in medical diagnostics, military and civilian surveillance, navigation autonomous vehicles, there is a need for low-cost alternatives to traditional materials used optics such as germanium. Sulfur-rich copolymers hold promise, they are made from feedstocks have high refractive index. In this report, cyclopentadiene was copolymerized with sulfur provide plastic the highest long-wave transparency reported date class materials. Diverse lens architectures...

10.26434/chemrxiv-2022-bzzd3 preprint EN cc-by 2022-10-31

Abstract Big data and artificial intelligence are driving increasing demand for high‐density storage. Probe‐based storage, such as mechanical storage using an atomic force microscope tip, is a potential solution with densities exceeding hard disks. However, the medium must be modifiable on nanoscale. While polymers promising media, they face challenges synthesis, erasing temperatures, stability. Here, low‐cost robust polymer system reported that allows repeated writing, reading erasing. The...

10.1002/advs.202409438 article EN cc-by Advanced Science 2024-12-16

The modification of polymer surfaces using laser light is important for many applications in the nano-, bio- and chemical sciences. Such capabilities have supported advances biomedical devices, electronics, information storage, microfluidics, other functional material applications. In most cases, these modifications require high power lasers that are expensive specialized equipment facilities to minimize risk hazardous irradiation. Additionally, systems can be easily modified by often...

10.26434/chemrxiv-2023-v23n6 preprint EN cc-by 2023-11-27

Inverse vulcanized polymer materials have received considerable attention as a way to use sulfur, an industrial by-product, starting material for synthesis. The resulting high-sulfur content polymers also been investigated because their properties give rise promising applications like infrared imaging, energy storage, and heavy metal capture due unique structure. However, synthesis of flexible sulfur network which shows good mechanical combining high strength, elongation, toughness is still...

10.26434/chemrxiv-2021-h3hwv preprint EN cc-by-nc 2021-10-22

The reaction between sulfur and dicyclopentadiene was optimised to form a shelf stable soluble low molecular weight oligomer. After simple curing process at 140 °C the material rendered insoluble resistant acids solvents. Taking advantage of oligomer, metal surface coated with dissolved which then cured show that copolymer layer can act as corrosion material. Further, silica gel oligomer test mercury removal applications. Even after curing, polymer an effective sorbent. Additionally, sorbent...

10.33774/chemrxiv-2021-n91h4 preprint EN cc-by 2021-10-19

Mr X, an 85 year old man, was inpatient recovering well from community acquired pneumonia. While on the ward in hospital, he tripped and fell. On primary survey maintained his own airway. He saturated at 98% air with a respiratory rate of 18 breaths per minute, had good vesicular entry bilaterally. His blood pressure 136/76 mmHg regular pulse 76 beats peripherally warm perfused (capillary refill time <2 seconds). alert orientated, Glasgow coma score 15/15. Results neurological examination...

10.1136/sbmj.d7923 article EN BMJ 2012-01-17

Inverse vulcanized polymer materials have received considerable attention as a way to use sulfur, an industrial by-product, starting material for synthesis. The resulting high-sulfur content polymers also been investigated because their properties give rise promising applications like infrared imaging, energy storage, and heavy metal capture due unique structure. However, synthesis of flexible sulfur network which shows good mechanical combining high strength, elongation, toughness is still...

10.33774/chemrxiv-2021-h3hwv preprint EN cc-by-nc 2021-10-22

The reaction between sulfur and dicyclopentadiene was optimised to form a shelf stable soluble low molecular weight oligomer. After simple curing process at 140 °C the material rendered insoluble resistant acids solvents. Taking advantage of oligomer, metal surface coated with dissolved which then cured show that copolymer layer can act as corrosion material. Further, silica gel oligomer test mercury removal applications. Even after curing, polymer an effective sorbent. Additionally, sorbent...

10.26434/chemrxiv-2021-n91h4 preprint EN cc-by 2021-10-19
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