𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Scale-up of Microwave-Assisted Polymerizations in Batch Mode: The Cationic Ring-Opening Polymerization of 2-Ethyl-2-oxazoline

✍ Scribed by Richard Hoogenboom; Renzo M. Paulus; Åke Pilotti; Ulrich S. Schubert

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
203 KB
Volume
27
Category
Article
ISSN
1022-1336

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Summary: The use of microwave heating in polymer science is a rapidly growing field of research leading to faster and cleaner polymerization procedures. However, the majority of the investigations are performed at small scales (≈1 mL), which is far away from potential commercial applications of microwave‐assisted polymerizations. In addition, it has been shown in organic chemistry that microwave‐assisted reaction protocols can be directly scaled without the need for process optimization. In this contribution, we have investigated the direct scaling of microwave‐assisted polymerization procedures under pressure conditions using the cationic ring‐opening polymerization of 2‐ethyl‐2‐oxazoline as the model system. This polymerization was performed at scales ranging from 4.0 mmol (1 mL) to 1.0 mol (250 mL) in different microwave synthesizers covering both monomode and multimode devices.

Scale‐up of microwave‐assisted polymerizations in batch mode: the cationic ring‐opening polymerization of 2 ethyl‐2‐oxazoline.

magnified imageScale‐up of microwave‐assisted polymerizations in batch mode: the cationic ring‐opening polymerization of 2 ethyl‐2‐oxazoline.

📜 SIMILAR VOLUMES

Scale-Up of Microwave-Assisted Polymeriz
Scale-Up of Microwave-Assisted Polymerizations in Continuous-Flow Mode: Cationic Ring-Opening Polymerization of 2-Ethyl-2-oxazoline
✍ Renzo M. Paulus; Tina Erdmenger; C. Remzi Becer; Richard Hoogenboom; Ulrich S. S 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 282 KB

## Abstract Microwave‐assisted polymerizations is a growing field of interest because the use of microwave irradiation instead of thermal heating was demonstrated to result in faster, cleaner, and higher yielding reactions. To overcome the one‐at‐a‐time nature of preparing polymerizations in single

Acetyl Halide Initiator Screening for th
Acetyl Halide Initiator Screening for the Cationic Ring-Opening Polymerization of 2-Ethyl-2-Oxazoline
✍ Renzo M. Paulus; C. Remzi Becer; Richard Hoogenboom; Ulrich S. Schubert 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 316 KB

## Abstract Kinetic investigations on the cationic ring‐opening polymerization of 2‐ethyl‐2‐oxazoline were conducted using acetyl chloride, acetyl bromide, and acetyl iodide as initiators. Various polymerization temperatures ranging from 80 to 220 °C were applied under microwave irradiation. The re

Single-Mode Microwave Ovens as New React
Single-Mode Microwave Ovens as New Reaction Devices: Accelerating the Living Polymerization of 2-Ethyl-2-Oxazoline
✍ Frank Wiesbrock; Richard Hoogenboom; Caroline H. Abeln; Ulrich S. Schubert 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 171 KB

## Abstract **Summary:** The ring‐opening cationic polymerization of 2‐ethyl‐2‐oxazoline was performed in a single‐mode microwave reactor as the first example of a microwave‐assisted living polymerization. The observed increase in reaction rates by a factor of 350 (6 h → 1 min) in the range from 80