Synthesis and Properties of In-Situ Bulk High Impact Polystyrene Toughened by High cis-1,4 Polybutadiene

Wang, Rui; Chang, Liangliang; Hu, Yanming; Wu, Guangfeng; Liu, Heng

doi:10.3390/polym11050791

Cited by 27 publications

(21 citation statements)

References 22 publications

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“…The presence of PA after film processing was confirmed in the three formulated films according to the absorption peak at 1745 cm −1 , which represented the stretching vibration of ester carbonyl (C=O) of the triglycerides (see zoomed area in Figure 1) being a clear indication of the presence of this additive in the processed formulations [33]. On the other hand, when PB was include in the formulations an absorption band at 3007 cm −1 appeared which corresponded to olefinic C-H stretching, in addition a signal at about 968 cm −1 , which is assigned to trans 1,4 units [34] was also present.…”

Section: Atr-ftir Analysismentioning

confidence: 85%

Double-Function Oxygen Scavenger and Aromatic Food Packaging Films Based on LDPE/Polybutadiene and Peanut Aroma

et al. 2021

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The aim of this study was to develop a double function active packaging material for nuts. The packaging solution, on the one hand, integrated polybutadiene (PB) as an oxygen scavenger and, on the other hand, it incorporated peanut aroma (PA) to improve customer’s sensorial experience. Different formulations based on low density polyethylene (LDPE), commercial PA (5 wt %) and PB at two levels (5 wt % and 13 wt %) were obtained by cast film extrusion. The obtained films were compared in terms of their mechanical, structural, optical and thermal properties confirming a plasticizing effect of PA and PB resulting in an increase in the ductility of the polymer and in a slight decrease in the thermal properties, maintaining their transparency. Regarding the oxygen capacity of the films, values of 4.4 mL and 2.7 mL O2 g−1 film were obtained for PE/PA/PB13 and PE/PA/PB5, respectively, after 6 days proving the suitability of the UV irradiation treatment in improving the oxygen absorption capacity of PB without the need of a metal catalyst. The aroma retention capacity into the polymer matrix was also evaluated in the developed formulations. The incorporation of PB in 13 wt % into a LDPE matrix improved the PA retention. This behavior was attributed to the ability of PB in enhancing cross-linking of LDPE as the concentration of PB increases. The results suggested the potential of PE/PB/PB13 films as oxygen scavenger and aromatic food packaging system to offer protection against lipid oxidation in nuts.

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Section: Atr-ftir Analysismentioning

confidence: 85%

Double-Function Oxygen Scavenger and Aromatic Food Packaging Films Based on LDPE/Polybutadiene and Peanut Aroma

et al. 2021

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“…HIPS is a polymer with a continuous phase of polystyrene (PS) matrix and dispersed phase of rubber particles with PS occlusions [31]. High-impact polystyrene samples break according to the brittle fracture mechanism with low elongation (they show brittleness).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…It is widely used in prototyping as it is characterized by high dimensional stability, low cost, and ease of processing and coloring [28,29]. This polymer is obtained as a result of the free radical polymerization of styrene in the presence of rubbers, usually polybutadiene (PB), to enhance the impact strength and toughness of polystyrene [30][31][32]. However, the continuous development of 3D printing technology results in the need to produce feedstock materials with improved properties [33].…”

Section: Introductionmentioning

confidence: 99%

High-Impact Polystyrene Reinforced with Reduced Graphene Oxide as a Filament for Fused Filament Fabrication 3D Printing

et al. 2021

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Graphene and its derivatives, such as graphene oxide (GO) or reduced graphene oxide (rGO), due to their properties, have been enjoying great interest for over two decades, particularly in the context of additive manufacturing (AM) applications in recent years. High-impact polystyrene (HIPS) is a polymer used in 3D printing technology due to its high dimensional stability, low cost, and ease of processing. However, the ongoing development of AM creates the need to produce modern feedstock materials with better properties and functionality. This can be achieved by introducing reduced graphene oxide into the polymer matrix. In this study, printable composite filaments were prepared and characterized in terms of morphology and thermal and mechanical properties. Among the obtained HIPS/rGO composites, the filament containing 0.5 wt% of reduced graphene oxide had the best mechanical properties. Its tensile strength increased from 19.84 to 22.45 MPa, for pure HIPS and HIPS-0.5, respectively. Furthermore, when using the HIPS-0.5 filament in the printing process, no clogging of the nozzle was observed, which may indicate good dispersion of the rGO in the polymer matrix.

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“…HIPS and ABS adopt this strategy by polymerizing styrene or styrene- co -acrylonitrile (SAN) in the presence of an initiator and rubbery polybutadiene (PB), which phase separates into a nanoscale rubber dispersion. PB domains arrest crack propagation through a cavitation-mediated stress dissipation mechanism that relieves triaxial tension in the matrix. , Stress is transformed from plane strain to plane stress, resulting in the formation of a large plastic zone . Rubbery particles exhibit a critical volumetric strain required to induce cavitation, and the deformation phenomena increase monotonically with decreasing particle size .…”

Section: Introductionmentioning

confidence: 99%

Cavitation-Mediated Fracture Energy Dissipation in Polylactide at Rubbery Soybean Oil-Based Block Copolymer Interfaces Formed via Reactive Extrusion

Kuehl

Hohmann

Lee

et al. 2022

ACS Appl. Mater. Interfaces

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Here, we spearhead a new approach to biopolymer impact modification that demonstrates superior performance while maintaining greater than 99% compostability. Using soybean-based monomers, a virtually untapped resource in terms of commercial volume and overall cost, a series of hyperbranched block copolymers were synthesized and melt-processed with poly(l-lactide) (PLA) to yield impact resistant all-polymer composites. Although PLA impact modification has been treated extensively, to date, the only practical solutions have relied on non-compostable petroleum-based rubbers. This study illustrates the activity of energy dissipation mechanisms such as cavitation, classically relegated to well-entangled petroleum-based rubbers, in poorly entangled hyperbranched soybean-based rubbers. Furthermore, we present a complete study of the mechanical performance and morphology of these impact modified PLA composites. The significance of combining deformation theory with a scalable green alternative to petroleum-based rubbers opens up a potential avenue for cheap compostable engineering thermoplastics.

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Synthesis and Properties of In-Situ Bulk High Impact Polystyrene Toughened by High cis-1,4 Polybutadiene

Cited by 27 publications

References 22 publications

Double-Function Oxygen Scavenger and Aromatic Food Packaging Films Based on LDPE/Polybutadiene and Peanut Aroma

Double-Function Oxygen Scavenger and Aromatic Food Packaging Films Based on LDPE/Polybutadiene and Peanut Aroma

High-Impact Polystyrene Reinforced with Reduced Graphene Oxide as a Filament for Fused Filament Fabrication 3D Printing

Cavitation-Mediated Fracture Energy Dissipation in Polylactide at Rubbery Soybean Oil-Based Block Copolymer Interfaces Formed via Reactive Extrusion

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