Relating Large Amplitude Oscillatory Shear and Food Behavior: Correlation of Nonlinear Viscoelastic, Rheological, Sensory and Oral Processing Behavior of Whey Protein Isolate/κ-Carrageenan Gels

2013 ◽  
Vol 36 (4) ◽  
pp. 521-534 ◽  
Author(s):  
H.S. Melito ◽  
C.R. Daubert ◽  
E.A. Foegeding
Keyword(s):  
Whey Protein ◽  
Large Amplitude ◽  
Whey Protein Isolate ◽  
Protein Isolate ◽  
Oscillatory Shear ◽  
Food Behavior ◽  
Large Amplitude Oscillatory Shear ◽  
Nonlinear Viscoelastic ◽  
Oral Processing

scholarly journals Viscoelastic Rheological Behaviors of Polypropylene and LMPP Blends

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3485
Author(s):  
Feichao Zhu ◽  
Sohail Yasin ◽  
Munir Hussain
Keyword(s):  
Large Amplitude ◽  
Viscoelastic Behavior ◽  
Nonlinear Behavior ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Mechanical Responses ◽  
Nonlinear Viscoelastic ◽  
Linear Viscoelastic ◽  
Viscoelastic Behaviors ◽  
Linear And Nonlinear

Dynamic oscillatory shear testing is used to investigate polymeric viscoelastic behaviors. Small and large amplitude oscillatory shear tests are the canonical method for characterizing the linear and nonlinear viscoelastic behaviors of any polymeric material. With prominent and abundant work on linear viscoelastic studies, the nonlinear behavior is evasive in terms of generating infinite higher harmonics in the nonlinear regime. For this reason, intrinsic nonlinearities from large amplitude oscillatory shear (LAOS) studies have recently been used for insights on microstructural behaviors. This study is carried out for linear and nonlinear viscoelastic behavior with a main focus on LAOS of isostatic polypropylene (iPP) and relatively new low molecular weight and low modulus polypropylene-based polyolefin (LMPP) blends. The morphological results showed reduced spherulitic crystal nucleus size and increased distribution in blends with increasing LMPP. The blends showed subtle linear viscoelastic responses with strong nonlinear mechanical responses to variant strain and stress compared to pure iPP. The intracycle strain thickening and intracycle strain stiffening of high-content LMPP blends were comparatively dominant at medium strain amplitudes.

Rheological properties of soy protein isolate – carboxymethyl flaxseed gum mixed dispersions under large amplitude oscillatory shear

2020 ◽  
Vol 16 (7) ◽  
Author(s):  
Yu-xi Ma ◽  
Jin-lei Niu ◽  
Dong Li ◽  
Li-jun Wang
Keyword(s):  
Rheological Properties ◽  
Soy Protein ◽  
Large Amplitude ◽  
Soy Protein Isolate ◽  
Shear Thickening ◽  
Shear Thinning ◽  
Protein Isolate ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Flaxseed Gum

AbstractCarboxymethyl flaxseed gum (CMFG) is developed in our laboratory by modifying flaxseed gun through carboxymethylation. The aim of this study is to reveal the rheological properties of soy protein isolate – carboxymethyl flaxseed gum (SPI-CMFG) mixed dispersion in realistic processing conditions by conducting large amplitude oscillatory shear (LAOS) test, with consideration of concentration and degree of substitution (DS) of CMFG. Results showed that increasing CMFG concentration significantly increased storage moduli (Gʹ), loss moduli (Gʺ), and the apparent viscosity of all SPI-CMFG mixed dispersions. LAOS test illustrated that the dispersions experienced a transition from LAOS type IV to type III after increasing the concentration of CMFG, while the behavior converted from LAOS type I to type III by increasing DS. Fourier transform rheology (FTR) exhibited that increasing the concentration or DS of CMFG both induced a conversion from “soft sphere” to “hard sphere” behavior. The strain-stiffening ratio S and the shear-thickening ratio T demonstrated, that all SPI-CMFG dispersions experienced a similar conversion from strain stiffening to strain softening, and from shear thinning to shear thickening behaviors by increasing the concentration of CMFG. Nevertheless, the mixed dispersions presented shear thickening behaviors when DS was no more than 0.520 in the whole range of strain, while a conversion from shear thinning to shear thickening behavior occurred, when DS reached at 0.755 and 0.973.

Nonlinear viscoelastic properties of MR fluids under large-amplitude-oscillatory-shear

2002 ◽  
Vol 42 (3) ◽  
pp. 280-286 ◽  
Author(s):  
Weihua H. Li ◽  
Hejun Du ◽  
Guang Chen ◽  
Song Huat Yeo ◽  
Ningqun Guo
Keyword(s):  
Large Amplitude ◽  
Viscoelastic Properties ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Mr Fluids ◽  
Nonlinear Viscoelastic
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