In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays
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B. Esmaeili
In this work two types of montmorillonite, a pristine and an organo-modified clay (Cloisite 30B), were employed to produce (polyethylene terephthalate)-based nanocomposites via in situ polymerization. Using water as an intermediate medium, a stable dispersion of pristine clay in ethylene glycol was achieved. However, after polymerization, no significant gain was obtained in terms of delamination of silicate platelets. The polycondensation reaction when using Cloisite 30B was carried out at a temperature as low as 250°C in order to retain a considerable portion of the organo-modifier. The results showed that Cloisite 30B was successfully intercalated by the polymer chains, resulting in a d-spacing increase from 1.9 nm to about 3.6 nm. Although some mono and double silicate layers were observed in microscopy images, the major part of the organoclay remained in a tactoid intercalated form. Sampling during the polycondensation reaction revealed that, in this process, clay was first swelled efficiently by the monomer, and this structure was preserved in the early stage of polycondensation. However, the silicate platelets collapsed with time as the polycondensation progressed and larger molecular weight oligomers were formed. An investigation on the type of impeller used in the polymerization process showed that a slight improvement was achieved in terms of aggregate size and distribution when the anchor impeller was replaced by a helical one.
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© 2013, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Climatic Ageing of Components of Polymer Based Electrochromic Devices
- Previous Experimental Polymer Rheology Versus Flow Induced Crystallization
- Studies on the Effect of Pellet Size on Positive Conveying in Helically Grooved Single Screw Extruders
- Distortion of Interfaces in a Multilayer Polymer Co-extrusion Feedblock
- Preparation and Characterization of PES and PA Composite Membranes for Air Separation at Low Pressures
- Impact of Feed Opening Width and Position on PVC Extrusion Process Effectiveness
- Irradiation Strategy for Laser Transmission Welding of Thermoplastics Using High Brilliance Laser Source
- Polytetrafluoroethylene Paste Extrusion: A Fibrillation Model and Its Relation to Mechanical Properties
- Improving Weld Line Strength of Fiber Reinforced Plastics By Means of A “Flow Disruptor”
- Application of the Network Simulation Method to Flat Dies with Inverted Prelands
- In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays
- Rapid Communications
- Accurate Bio-scaling Processing of Micro Structured Shark Skin Based on Swelling of Polydimethylsiloxane
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Climatic Ageing of Components of Polymer Based Electrochromic Devices
- Previous Experimental Polymer Rheology Versus Flow Induced Crystallization
- Studies on the Effect of Pellet Size on Positive Conveying in Helically Grooved Single Screw Extruders
- Distortion of Interfaces in a Multilayer Polymer Co-extrusion Feedblock
- Preparation and Characterization of PES and PA Composite Membranes for Air Separation at Low Pressures
- Impact of Feed Opening Width and Position on PVC Extrusion Process Effectiveness
- Irradiation Strategy for Laser Transmission Welding of Thermoplastics Using High Brilliance Laser Source
- Polytetrafluoroethylene Paste Extrusion: A Fibrillation Model and Its Relation to Mechanical Properties
- Improving Weld Line Strength of Fiber Reinforced Plastics By Means of A “Flow Disruptor”
- Application of the Network Simulation Method to Flat Dies with Inverted Prelands
- In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays
- Rapid Communications
- Accurate Bio-scaling Processing of Micro Structured Shark Skin Based on Swelling of Polydimethylsiloxane
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts
