0504高分子製品 ゴム材料の割れを防ぐ新技術(Rubber that resists cracking: Improved process makes material 10 times stronger) 2025-05-22 ハーバード大学In the new rubber tanglemer, a long polymer strand at a crack tip de-concentrates stress over a long d... 2025-05-23 0504高分子製品