PP/Rosin Blends: Mechanical and Rheological Properties

Melting mixtures of polypropylene (PP) and glycerol ester of hydrogenated rosin (ester gum) were prepared under select conditions using up to 50% of rosin. The addition of modified rosin on PP increased the elastic modulus which maximum value was observed in the 70/30 PP/ROSIN blend. The stress drop...

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Published in:International journal of polymeric materials 2000-06, Vol.46 (1-2), p.395-402
Main Authors: Mendes, L. C., Cardoso, R. S., Chagas, B. S., Oliveira, M. L. C., Moares, G. F.
Format: Article
Language:English
Subjects:
Applied sciences
blend
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
Polypropylene
Properties and characterization
rheology
rosin
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creator Mendes, L. C.
Cardoso, R. S.
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Moares, G. F.
description Melting mixtures of polypropylene (PP) and glycerol ester of hydrogenated rosin (ester gum) were prepared under select conditions using up to 50% of rosin. The addition of modified rosin on PP increased the elastic modulus which maximum value was observed in the 70/30 PP/ROSIN blend. The stress dropped monotonically with rosin content. Above 10% rosin, the elongation at yield diminished and reached a constant value. The elongation at break dropped abruptly above 10% of rosin. The density and hardness of blends increased with amount of rosin. The melt flow index of blends increased exponentially with the rosin content while the torque decreased monotonically with the composition and the processability was improved.
doi_str_mv 10.1080/00914030008054869
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subjects Applied sciences
blend
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
Polypropylene
Properties and characterization
rheology
rosin
title PP/Rosin Blends: Mechanical and Rheological Properties
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