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Characterization of natural polyisoprenes and synthetic polybutadiene
Author(s) -
Vangani Veena,
Rakshit Animesh Kumar
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070450705
Subject(s) - polybutadiene , characterization (materials science) , natural rubber , viscosity , materials science , contact angle , polymer chemistry , intrinsic viscosity , chemical engineering , polymer science , thermal stability , viscous flow , synthetic rubber , macromolecule , composite material , chemistry , polymer , organic chemistry , copolymer , nanotechnology , biochemistry , engineering , physics , mechanics
Abstract Synthetic polybutadiene (PBR) and natural rubbers from India (InR) and Guyana (GR) have been characterized in detail. The characterization includes IR, NMR, GPC, DSC, TGA, contact angle, and viscosity measurements. Spectroscopic characterization helped in the differentiation of InR and GR. Viscosity data is used in the evaluation of activation parameters at infinite dilution of the viscous flow. Viscosity data is also used for the determination of the conformation of the macromolecules in various solvents. Surface characterization confirms the total hydrophobic nature of the three rubbers. Thermal analysis shows different degradation pattern for natural rubbers than for the synthetic rubber.