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"Regarding extended shear stability, Fang compared an optimised OCP and an HSI star polymer. Both were put through extended shear cycles, and targeted to meet the same KV100 after 90-cycle shear in ASTM D7109, the Kurt Orbahn test. While both passed, the test was extended to 720 cycles, eight times the 90-cycle limit, at which point the linear optimised OCP had only sheared an additional 5%, as opposed to significant deterioration in the HSI structure after continuing the test beyond the current limits. Fang pointed out that "different chemistry really has an impact on shear stability." The optimised OCP demonstrated robust extended shear stability, retaining most of its architecture instead of breaking down. This can aid in supporting extended drain performance, he said."
"Regarding extended shear stability, Fang compared an optimised OCP and an HSI star polymer. Both were put through extended shear cycles, and targeted to meet the same KV100 after 90-cycle shear in ASTM D7109, the Kurt Orbahn test. While both passed, the test was extended to 720 cycles, eight times the 90-cycle limit, at which point the linear optimised OCP had only sheared an additional 5%, as opposed to significant deterioration in the HSI structure after continuing the test beyond the current limits. Fang pointed out that "different chemistry really has an impact on shear stability." The optimised OCP demonstrated robust extended shear stability, retaining most of its architecture instead of breaking down. This can aid in supporting extended drain performance, he said."