Synthesis and Characteristics of Graft Copolymerization of Starch-G-PAM Using A Twin-Roll Mixer as Reactor for Cornstarch with Different Amylose/Amylopectin Ratios
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D. Qiao
Abstract
Starch-based superabsorbent polymers (SAPs) were produced by graft copolymerization of starch-g-acrylamide using a twin-roll mixer as reactor. This work focused on the effect of starch microstructure (amylose/amylopectin contents) from the same source (corn starch) on the graft ratio (GR), graft efficiency (GE) and Add-on (AO), as well as water absorption capability (WAC) of the SAPs, which were investigated by FTIR, NMR, gravimetric and TGA. The torque variation represented all the processing in the reactor, including compress, gelatinization, graft reaction and crosslinking. Results showed that all the starches were successfully grafted with acrylamide then crosslinked by N.N′-methylene-bisacrylamide through this technology. Both AO and GR increased with increasing amylose content. But the GE decreased with increasing amylose content, which is different from the results in the solution reaction. The higher WAC of high amylose starch-based SAP corresponds with higher AO and GR, while the higher WAC of waxy-based SAP corresponds with higher GE.
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Articles in the same Issue
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- The Processing Behavior of Liquid Sn/Molten Polyethylene during Internal Mixing
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- Microchannel Deformation of Polymer Chip in In-Mold Bonding
- Synthesis and Characteristics of Graft Copolymerization of Starch-G-PAM Using A Twin-Roll Mixer as Reactor for Cornstarch with Different Amylose/Amylopectin Ratios
- Experimental Investigation of PC-Films Using Optical Measurements
- Effect of Compounding Conditions on Static and Dynamic Mechanical Properties of High Density Polyethylene/Ground Tire Rubber Blends
- Effect of Feeding Strategy on the Mechanical Properties of PP/Recycled EPDM/PP-G-MA Blends
- Synthesis and Characterization of Chitosan & Amino Acid Superabsorbent Hydrogels
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- PPS News
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- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- The Processing Behavior of Liquid Sn/Molten Polyethylene during Internal Mixing
- Study on Packing Phase Control Based on the Cavity Pressure-Temperature during Injection Molding
- Synthesis and Properties of a Novel Intumescent Flame Retardant and its Application in LLDPE
- The Mechanism of Neck-in Phenomenon in Film Casting Process
- Morphology, Mechanical and Thermal Properties of Recycled PC/ABS Blends Processed via Vane Extruder
- Thermal Conductivity of Polypropylene Composites with Combined Boron Nitride Fillers
- Characterization on Biodegradation of Enzymatically Synthesized Polylactic Acid by Using Alkaline Protease and Lipase
- Numerical Investigation and Experimental Observation of Extrudate Swell for Viscoelastic Polymer Melts
- Processing and Wear Analysis of Blast Furnace Slag Filled Polypropylene Composites Using Taguchi Model and ANN
- Microchannel Deformation of Polymer Chip in In-Mold Bonding
- Synthesis and Characteristics of Graft Copolymerization of Starch-G-PAM Using A Twin-Roll Mixer as Reactor for Cornstarch with Different Amylose/Amylopectin Ratios
- Experimental Investigation of PC-Films Using Optical Measurements
- Effect of Compounding Conditions on Static and Dynamic Mechanical Properties of High Density Polyethylene/Ground Tire Rubber Blends
- Effect of Feeding Strategy on the Mechanical Properties of PP/Recycled EPDM/PP-G-MA Blends
- Synthesis and Characterization of Chitosan & Amino Acid Superabsorbent Hydrogels
- Rapid Communications
- Negative Pressures in Modelling Rotating Polymer Processing Machinery Are Meaningless, But They Are Telling Something
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts