Ring-opening polymerization of lactones catalyzed by ion-exchanged clay montmorillonite

J of Applied Polymer Sci

2006

ABSTRACT:The polymerization of styrene oxide was carried out at 20°C in chloroform with an acid-exchanged montmorillonite as acid solid ecocatalyst (Mag-H ϩ ). The effect of the amount of catalyst, solvent, and concentration of monomer on yield and molecular weight of polymer was studied. A typical reaction product (PSTO) was analyzed by infrared and nuclear magnetic resonance spectroscopy, as well as by gel-permeation chromatography and MALDI-TOFMS. The mechanism of the polymerization appears to be cationic.

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Section: Mag-hsupporting

confidence: 92%

Ring‐opening polymerization of styrene oxide with Maghnite‐H⁺ as ecocatalyst

J of Applied Polymer Sci

2006

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“…This finding is in good agreement with the proposal that Mag-H is present as the active initiator species since the number of those species should be related to their surface area. Similar results are obtained by Kadakowa et al [36], and Crivello et al [37], in the polymerization of lactones by Sn-montmorillonite and cyclohexene oxide by Cobalt respectively.…”

Section: Polymerization and Products Characterizationsupporting

confidence: 80%

Cationic Polymerization of 1,2-Epoxypropane by an Acid Exchanged Montmorillonite Clay in the Presence of Ethylene Glycol

Hachemaoui

2003

IJMS

“…This finding is in good agreement with the proposal that Mag-H þ is present as the active initiator species since the number of those species should be related to their surface area. Similar results are obtained by Kadakowa et al, 32 and Crivello and Fan, 33 in the polymerization of lactones by Sn-montmorillonite and cyclohexene oxide by Cobalt, respectively. Figure 2 shows the yield of polymer versus time for the acetonitrile solution polymerization of TMOX, using Mag-H þ as catalyst.…”

Section: Cationic Polymerization Of Tmoxsupporting

confidence: 90%

Synthesis of hydrosoluble polymers of oxazoline using Maghnite‐H as catalyst

Hachemaoui

J of Applied Polymer Sci

2007