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Fall Technical Meeting – 2024
September 24 @ 4:00 pm - 9:00 pm
$35
Interested in Additional Education? New to the Rubber Industry? Check out the “Rubber Explained” Course offered earlier in the day. This course is FREE to Ohio Rubber Group Members
Agenda:
4:00 – Dinner Ticket / Membership Sales
4:30 – Technical Presentations
6:00 – Social Hour
7:00 – Dinner
Advanced Reservations: $35 each ***Without prior reservation: $40 each (limited number available)
Email reservations to Denise Kotz at denisekotz@strategicrealm.consulting OR mail to Ohio Rubber Group, PO Box 553, Hudson, OH 44236.
Fall Technical Meeting Reservation Form
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Technical Presentations:
“Smart Devulcanization of End-of-Life Tire Enhanced Interface Along With Mechanical Properties in NR/SBR Compound”
Marzieh Shabani, Grad. Student in Polymer Science, The University of Akron, and 2024 ORG Spring Meeting “Best Poster” Winner
Ground tire rubber (GTR) was devulcanized using plasma and sonication treatments for various time. The soluble content and cross-link density of the samples were analyzed, with Horikx’s model employed to assess the selectivity of these treatments. Additionally, we explored enhancing the interface between devulcanized ground tire rubber particles (DGRPs) and virgin rubber (NR/SBR) to mitigate crack propagation and defect acceleration in the blends caused by DGRPs. Adhesion energy measurements, conducted using laminates of cured and uncured rubber strips to model the interface, revealed a threefold increase after devulcanization, confirming a significant improvement in the interface. Plasma-treated DGTRs showed a slightly higher degree of devulcanization (76%) compared to sonication (73%), though this was accompanied by lower selectivity due to the effects of higher temperatures, indicating notable degradation. Mechanical properties, including Young’s modulus, improved by 123-200% after blending DGTR with virgin NR/SBR, while elongation at break decreased by 16-34%.
“Recent Advances in Polyisobutylene & Butyl Elastomers for Medical Applications”
Arsalaan Nisar Pathan, Grad. Student in Polymer Science, The University of Akron, and 2024 Scholarship Winner
Polyisobutylene (PIB) is a low Tg polymer which demonstrates excellent gas impermeability, oxidative resistance and high extensibility and typically finds use in tires as butyl rubber. Medical grade PIB elastomers like Styrene Isobutylene Block copolymers (SIBS) commercially available in drug-eluting stent coatings and glaucoma treatment devices, utilize the bioinert nature of the PIB backbone which makes the implant calcification resistant with no thrombosis or blood aggregation when implanted into the body. Although SIBS has modest tensile properties, reinforcement with styrene domains introduces drawbacks like poor creep properties, reduced gas permeability and inability to be sterilized by radiation during surgical procedures.
This talk will introduce a recent extension to the PIB elastomers family, where the soft PIB chains are reinforced with (1) semicrystalline Polyurethane hard segments and (2) disulfide network through additive-free vulcanization. These can be designed to cater to more dynamic medical applications like orthopedic implants or heart valve implants. The presentation will highlight the key features of these materials like excellent shape retention, flexural strength, resistance to calcification compared to other commercial polymeric biomaterials. These works suggest the viability of PIB for heart valve applications which can last for up to 1 billion cycles or a service life of around 35 – 40 years compared to the current valve alternatives which only last for 12 – 15 years.
“Silox’s Active ZnO vs Traditional ZnO”
Fatmeh Kuraan, Technical Sales Representative for Silox Canada
Silox is a worldwide supplier of Zinc oxide with manufacturing sites in Canada, Europe, and India. Zinc oxide is an important ingredient in the rubber world that encourages vulcanization. Vulcanization is an essential chemical reaction for rubber and improves rubber elasticity and strength making it more resilient and durable.
This presentation will introduce Zinc oxide and the many different chemical process to make Zinc oxide.
There will be a focus on Active Zinc oxide which offers many benefits in a rubber formulation and is a product of the wet process.
This presentation will compare Active Zinc oxide to French Process Zinc oxide which is the most commonly used in the rubber industry today.
We will go over the benefits of using Active Zinc oxide relative to cost, substantiality and processing improvements compared to French Process Zinc oxide.