英寸
发表于 2025-4-1 03:41:26
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Mammal
发表于 2025-4-1 06:01:13
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Condescending
发表于 2025-4-1 12:07:40
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fatty-acids
发表于 2025-4-1 16:03:13
Mariam Sadek Kottb,Nada Sharafd processes (Fig 4.1). In most cases, the basic polymer-forming reaction occurs between the isocyanate and a polyol. This is a simple addition process which, when extended to polyfunctional reagents, provides a direct route to covalently crosslinked polymers. Density reduction is provided via