Better characterization of raw natural rubber by decreasing the rotor speed of Mooney viscometer: Role of macromolecular structure
Copyright policy )Better characterization of raw natural rubber by decreasing the rotor speed of Mooney viscometer: Role of macromolecular structure
Abstract The objective of our work was to characterize natural rubber (NR) samples with different macromolecular structures by measuring Mooney viscosities (V R ) at variable rotor speeds ≤2 rpm, called variable speed Mooney viscosity (M VS ). Model samples of technically specified rubbers of constant Mooney viscosity (TSR5CV) were prepared with chosen specific clones. The structures of the samples were characterized by size‐exclusion chromatography coupled with an online multi‐angle light‐scattering detector (SEC‐MALS). Rheological properties of the samples were also characterized by a dynamic moving die rheometer. Measuring monoclonal model samples by M VS showed three types of V R flow curves. The V R at high rotor speed (2 rpm) was correlated with number‐average molar mass ( M n ), whereas V R at low rotor speed (0.05 rpm) was correlated with weight‐average molar mass ( M w ). Measuring M VS revealed the rheological behaviors of samples and enabled discrimination between samples with different macromolecular structures and should thus help in predicting processability. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement France
- Agropolymerpolymer Engineering and Emerging Technologies France
- Département Sciences sociales, agriculture et alimentation, espace et environnement France
- Montpellier SupAgro France
- University of Montpellier France
propriété rhéologique, [SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering, http://aims.fao.org/aos/agrovoc/c_1414, [SDV.IDA] Life Sciences [q-bio]/Food engineering, structure cellulaire, poids moléculaire, http://aims.fao.org/aos/agrovoc/c_4892, caoutchouc, http://aims.fao.org/aos/agrovoc/c_6678, Viscosité, http://aims.fao.org/aos/agrovoc/c_4073, [SDV.IDA]Life Sciences [q-bio]/Food engineering, propriété physicochimique, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, CAOUTCHOUC NATUREL, http://aims.fao.org/aos/agrovoc/c_15219, http://aims.fao.org/aos/agrovoc/c_1521, Q60 - Traitement des produits agricoles non alimentaires, VISCOSITE MOONEY, http://aims.fao.org/aos/agrovoc/c_6553
propriété rhéologique, [SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering, http://aims.fao.org/aos/agrovoc/c_1414, [SDV.IDA] Life Sciences [q-bio]/Food engineering, structure cellulaire, poids moléculaire, http://aims.fao.org/aos/agrovoc/c_4892, caoutchouc, http://aims.fao.org/aos/agrovoc/c_6678, Viscosité, http://aims.fao.org/aos/agrovoc/c_4073, [SDV.IDA]Life Sciences [q-bio]/Food engineering, propriété physicochimique, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, CAOUTCHOUC NATUREL, http://aims.fao.org/aos/agrovoc/c_15219, http://aims.fao.org/aos/agrovoc/c_1521, Q60 - Traitement des produits agricoles non alimentaires, VISCOSITE MOONEY, http://aims.fao.org/aos/agrovoc/c_6553
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