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Non-isothermal Crystallization of Surface Modified Polyethylene Glycol (PEG) Particles

Na Song

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Abstract

The surface of Polyethylene glycol(PEG) particles were modified by using ethyl cellulose.Influence of the PEG particles' size on non-isothermal crystallization was investigated by using a differential scanning calorimeter(DSC).It was inferred that the crystallization ends when the fronts of the spherulites in the surface modified PEG particle arrive the wall.But the fronts of the spherulites in original PEG particle are likely to reach inside of adjacent PEG particles.The half time of the crystallization and the fastest time of the crystallization of the surface modified PEG particles are shorter than those of the original PEG particles.The crystallization peak position of the surface modified PEG particles shifts to higher temperature when that the PEG particles' diameter is less than 400μm.

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What this paper is about

The surface of Polyethylene glycol(PEG) particles were modified by using ethyl cellulose.Influence of the PEG particles' size on non-isothermal crystallization was investigated by using a differential scanning calorimeter(DSC).It was inferred that the crystallization ends when the fronts of the spherulites in the surface modified PEG particle arrive the wall.But the fronts of the spherulites in original PEG particle are likely to reach inside of adjacent PEG particles.The half time of the crystallization and the fastest time of the crystallization of the surface modified PEG particles are shorter than those of the original PEG particles.The crystallization peak position of the surface modified PEG particles shifts to higher temperature when that the PEG particles' diameter is less than 400μm.

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Available abstract

The surface of Polyethylene glycol(PEG) particles were modified by using ethyl cellulose.Influence of the PEG particles' size on non-isothermal crystallization was investigated by using a differential scanning calorimeter(DSC).It was inferred that the crystallization ends when the fronts of the spherulites in the surface modified PEG particle arrive the wall.But the fronts of the spherulites in original PEG particle are likely to reach inside of adjacent PEG particles.The half time of the crystallization and the fastest time of the crystallization of the surface modified PEG particles are shorter than those of the original PEG particles.The crystallization peak position of the surface modified PEG particles shifts to higher temperature when that the PEG particles' diameter is less than 400μm.

Key concepts: Crystallization, PEG ratio, Materials science, Polyethylene glycol, Differential scanning calorimetry, Particle (ecology), Chemical engineering, Polymer chemistry

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