Rational Synthesis of Helically Coiled Carbon Nanowires and Nanotubes through the Use of Tin and Indium Catalysts

Synthesis of nylon 4 through the use of

Synthesis of nylon 4 through the use of the carbon dioxide/potassium pyrrolydonate catalyst system with and without added 18-Crown-6 ether activator

✍ Robert Y. M. Huang; Ji-Won Rhim 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 438 KB

The anionic polymerization of 2-pyrrolidone at 40°C via CO,/KOH and CO.JKOH/l8-Crown ether catalyst for membrane separation purposea was investigated in detail. The effeds of reaction time, (2% quantity, and potassium hydroxide concentration including crown ether on yield and intrinsic viscoSity wer