Shear and Extensional Rheology of Linear and Branched Polybutylene Succinate Blends

Bourg, Violette; Valette, Rudy; Moigne, Nicolas Le; Ienny, Patrick; Guillard, Valérie; Bergeret, Anne

doi:10.3390/polym13040652

Cited by 21 publications

(12 citation statements)

References 46 publications

(64 reference statements)

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“…The addition of PLA and PHB shows an increase in the non‐Newtonian behavior of the blends. This behavior of the shear thinning index can also be attributed to the polydispersity of PBS, its effect on chain‐scissoring, and molecular weight distribution 45,46,49,50 . The consistency parameter ( K ) corresponds to the value of n .…”

Section: Resultsmentioning

confidence: 99%

“…This behavior of the shear thinning index can also be attributed to the polydispersity of PBS, its effect on chainscissoring, and molecular weight distribution. 45,46,49,50 The consistency parameter (K) corresponds to the value of n. Parameter K decreased with a PBS concentration increase. The highest K value is 3.540 for PLA which relates to shear thinning and non-Newtonian behavior.…”

Section: Processibilitymentioning

confidence: 99%

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Fabrication of poly(lactic acid), poly(butylene succinate), and poly(hydroxybutyrate) bio‐based and biodegradable blends for application in fused filament fabrication‐based 3D printing

Sabalina

Gaidukovs

Jurinovs

et al. 2023

J of Applied Polymer Sci

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The present study highlights biodegradable and bio‐based polymer blends from poly(lactic acid), poly(butylene succinate) (PBS), and poly(hydroxybutyrate) (PHB) as potential filaments for additive manufacturing. Dog‐bone‐shaped parts were prepared using the fused filament fabrication (FFF) technique. To assess polymer compatibility, interface, and printing performance, vertical and horizontal models were prepared and compared. The ratios of PBS/PLA and PBS/PHB were fixed at 5:5 and 7:3 for this research, respectively. The design concept is based on combining high elastic modulus glassy polymers (PLA and PHB) with soft, ductile PBS. The addition of PBS enhanced thermal processing and rheological properties. Scanning electron microscopy images revealed that the blends produced high‐quality prints while maintaining the original resolution and input parameters. Tensile tests revealed that PBS/PLA blends had significantly higher performance properties than PBS/PHB blends. Vertical prints that coincided with strain direction produced significant plastic deformation in PBS/PLA blends, achieving uniform elongation values of up to 10.4% and elongation at break values exceeding 150%. PBS/PHB blends showed lower compatibility for FFF compared with PBS/PLA blends. Produced bio‐based prints showed an increase in elastic modulus and tensile properties distinct from pure‐polymers; thus, blends have excellent potential for tuning the mechanical properties of the final product.

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Section: Resultsmentioning

confidence: 99%

Section: Processibilitymentioning

confidence: 99%

Fabrication of poly(lactic acid), poly(butylene succinate), and poly(hydroxybutyrate) bio‐based and biodegradable blends for application in fused filament fabrication‐based 3D printing

Sabalina

Gaidukovs

Jurinovs

et al. 2023

J of Applied Polymer Sci

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“…In order to proceed from oscillation to extension, the multimode Maxwell model, eqs 1 and 2, was used to determine the linear viscoelastic (LVE) envelope from small-amplitude oscillatory shear (SAOS) data. 48 The time−temperature superposition of storage (G′) and loss (G″) moduli for PS and PMMA was performed at 155 °C, the reference temperature of the extensional rheology experiments (see Figure S3a,b). The calculations were done according to the following equations:…”

Section: Methodsmentioning

confidence: 99%

Extensional Viscosity of Immiscible Polymer Multi-Nanolayer Films: Signature of the Interphase

Dmochowska,

Peixinho,

Sollogoub

et al. 2023

Macromolecules

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The measurement of interfacial mechanical or rheological properties in polymer blends is a challenging task, as well as providing a quantitative link between these properties and the interfacial nanostructure. Here, we perform a systematic study of the extensional rheology of multilayer films of an immiscible polymer pair, polystyrene and poly(methyl methacrylate). We take advantage of multi-nanolayer coextrusion to increase the number of interfaces up to thousands, consequently magnifying the interfacial response of the films. The transient elongational response is compared to an additivity rule model based on the summation of the contribution of each polymer as well as the interfacial one. At low strain rates, the model reproduces the transient extensional viscosity up to strainthinning, while at larger strain rates, the extra stress exceeds the prediction based on constant interfacial tension. This extra contribution is attributed to an interphase modulus on the order of 1−10 MPa, which increases with the strain rate following a power law with an exponent of 1/3. The extensional rheology of multinanolayer films is then an efficient combination to go beyond interfacial tension and quantitatively measure the interfacial rheology of immiscible polymer blends.

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“…The influence of long-chain branching on the rheological properties of conventional polyolefins, such as polyethylene (PE) [ 40 , 41 , 42 , 43 , 44 ] and polypropylene (PP), has been investigated [ 45 , 46 , 47 ]. Studies reveal that long-chain branches have a significant impact on the processing properties [ 48 ] and have a strong effect on the viscosity as well as the elasticity under small-amplitude oscillatory shear flow [ 49 ]. The fundamental characteristics of dynamics of entangled LCB polymers have been explained by the mean-field tube theory, which assumes that the chain is strictly restricted to such a one-dimensional curvilinear tube region, leading to a snake-like repetitive motion [ 50 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamical and Structural Properties of Comb Long-Chain Branched Polymer in Shear Flow

Wang

Wen

Zhang

et al. 2022

IJMS

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Using hybrid multi-particle collision dynamics (MPCD) and a molecular dynamics (MD) method, we investigate the effect of arms and shear flow on dynamical and structural properties of the comb long-chain branched (LCB) polymer with dense arms. Firstly, we analyze dynamical properties of the LCB polymer by tracking the temporal changes on the end-to-end distance of both backbones and arms as well as the orientations of the backbone in the flow-gradient plane. Simultaneously, the rotation and tumbling behaviors with stable frequencies are observed. In other words, the LCB polymer undergoes a process of periodic stretched–folded–stretched state transition and rotation, whose period is obtained by fitting temporal changes on the orientation to a periodic function. In addition, the impact induced by random and fast motions of arms and the backbone will descend as the shear rate increases. By analyzing the period of rotation behavior of LCB polymers, we find that arms have a function in keeping the LCB polymer’s motion stable. Meanwhile, we find that the rotation period of the LCB polymer is mainly determined by the conformational distribution and the non-shrinkable state of the structure along the velocity-gradient direction. Secondly, structural properties are numerically characterized by the average gyration tensor of the LCB polymer. The changes in gyration are in accordance with the LCB polymer rolling when varying the shear rate. By analyzing the alignment of the LCB polymer and comparing with its linear and star counterparts, we find that the LCB polymer with very long arms, like the corresponding linear chain, has a high speed to reach its configuration expansion limit in the flow direction. However, the comb polymer with shorter arms has stronger resistance on configuration expansion against the imposed flow field. Moreover, with increasing arm length, the comb polymer in shear flow follows change from linear-polymer-like to capsule-like behavior.

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Shear and Extensional Rheology of Linear and Branched Polybutylene Succinate Blends

Cited by 21 publications

References 46 publications

Fabrication of poly(lactic acid), poly(butylene succinate), and poly(hydroxybutyrate) bio‐based and biodegradable blends for application in fused filament fabrication‐based 3D printing

Fabrication of poly(lactic acid), poly(butylene succinate), and poly(hydroxybutyrate) bio‐based and biodegradable blends for application in fused filament fabrication‐based 3D printing

Extensional Viscosity of Immiscible Polymer Multi-Nanolayer Films: Signature of the Interphase

Dynamical and Structural Properties of Comb Long-Chain Branched Polymer in Shear Flow

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