Plastic Pipes Conference Association # 2023 Lake Buena Vista
Jiyong Park, JaeHyuck Han, YoungGu Kim, Eunjin Park
This study investigates the influence of various parameters on polymer design to determine the slow crack growth. HDPE(High Density Polyethylene) materials with different molecular weight distribution and comonomer content for PE100-RC pipe were investigated with cracked round bar test. The cracked round bar test provides accelerated slow crack growth of HDPE materials for pipe within less than a week at 23℃, thus predicting long-term slow crack growth behavior of PE100-RC pipes. To evaluate the correlation between polymer design and slow crack growth, conditions of polymer design parameters were controlled. And, the suitability of the cracked round bar test was evaluated through comparison with the results of another slow crack growth test method, Strain Hardening Test(SHT). In addition, among the various polymer design parameters that affect the slow crack growth test results, the sensitive factors were identified. Results show that the certain correlation between the polymer design parameters and slow crack growth property by cracked round bar test.
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