Preparation, characterization, and properties of polyethylene composites highly filled with calcium carbonate through co‐rotating conical twin‐screw extrusion

Zhang, Xinxing; Zhang, Wei; Su, Jingyi; Wang, Mengya; Lu, Canhui

doi:10.1002/vnl.21345

Cited by 5 publications

(5 citation statements)

References 24 publications

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“…The phase morphology study of semicrystalline and crystalline polymers has usually done by POM to observe the spherulite structures . Figure exhibits the POM images of all samples.…”

Section: Resultsmentioning

confidence: 99%

Polyethylene‐g‐starch nanoparticle biocomposites: Physicochemical properties and biodegradation studies

et al. 2017

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Low density polyethylene‐g‐maleic anhydride‐g‐starch nanoparticle (LMNS) biocomposites have been synthesized in water medium. LMNS biocomposites were fabricated with different starch nanoparticle (NS) loadings (2, 4, 6, 8, and 10 wt%) by compression molding technique. Fourier transform infrared spectroscopy revealed ester linkage between maleic anhydride grafted low density polyethylene (LM) and NS, thereby confirming the improved compatibility of the biocomposites. Thermal analysis confirmed the chemical linkage of NS on LM chains. The wettability and surface roughness characteristics of biocomposites were evaluated by water sorption, static contact angle, and atomic force microscopy. Water sorption was improved due to the increase of NS content in samples, whereas the water contact angle and surface roughness were diminished. The load at maximum, tensile strength and percentage of elongation at break for the biocomposites were enhanced with the increase in NS content. The morphology analysis of samples revealed homogenous distribution and good interfacial adhesion. The biodegradation enhancement of samples has been revealed by fungal and soil burial tests. POLYM. COMPOS., 39:E426–E440, 2018. © 2017 Society of Plastics Engineers

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“…The phase morphology study of semicrystalline and crystalline polymers has usually done by POM to observe the spherulite structures . Figure exhibits the POM images of all samples.…”

Section: Resultsmentioning

confidence: 99%

Polyethylene‐g‐starch nanoparticle biocomposites: Physicochemical properties and biodegradation studies

et al. 2017

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“…Such compression zone designs can be both considered soft (long) or strong (short). Conical and mixed-shape screws have been explored in studies for materials such as thermoplastic polyurethane, polyvinyl chloride (PVC), and plastic composites [73][74][75].…”

Section: Screw Typementioning

confidence: 99%

An Overview of Extrusion as a Pretreatment Method of Lignocellulosic Biomass

et al. 2022

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Lignocellulosic biomass is both low cost and abundant, and unlike energy crops, can escape associated ethical dilemmas such as arable land use and food security issues. However, their usage as raw material in a biorefinery implies an inherent upstream pretreatment step to access compounds of interest derived from lignocellulosic biomass. Importantly, the efficiency of this step is determinant for the downstream processes, and while many pretreatment methods have been explored, extrusion is both a very flexible and promising technology. Extrusion is well-known in both the polymer and pharmaceutical industries and has been used since the 18th century. However, as a pretreatment method for lignocellulosic biomass, extrusion is relatively new. The first use for this purpose dates back to the 1990s. Extrusion enjoys a high degree of flexibility due to the many available parameters, but an understanding of extrusion requires a knowledge of these parameters and the different relationships between them. In this paper, we present a concise overview of lignocellulosic biomass extrusion by reviewing key extrusion parameters and their associated extruder design components and operating conditions.

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“…15 When the CaCO 3 filling amount is 50 wt% or over in UPR/CaCO 3 composites, it belongs to the highfilled composite. 16,17 However, an increase in the filler filling amount leads to an increase in the viscosity of the whole composite system, which is unfavorable to the infiltration of the resin into the filler. Therefore, in order to solve the adverse effects of high filling, adding lowviscosity resin, surface modification of filler, and using special dispersion equipment are the most common methods.…”

Section: Introductionmentioning

confidence: 99%

“…The filling amount of CaCO 3 in common composites such as filled masterbatch is 75%–85%, 14 while in artificial stone, it is as high as 80%–90% 15 . When the CaCO 3 filling amount is 50 wt% or over in UPR/CaCO 3 composites, it belongs to the high‐filled composite 16,17 . However, an increase in the filler filling amount leads to an increase in the viscosity of the whole composite system, which is unfavorable to the infiltration of the resin into the filler.…”

Section: Introductionmentioning

confidence: 99%

Effect of inorganic particles gradation on the properties of high‐filled unsaturated polyester resin/CaCO₃ composites

Liu,

et al. 2023

Polymer Composites

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The preparation of high‐filled composites by compounding with calcium carbonate (CaCO3) and polymer has received much attention. However, challenges such as enhancing the interaction between CaCO3 and the polymer and improving the performance of the resulting composites need to be addressed. In this paper, composites with a high filler content were made by adding fillers of various CaCO3 gradations into unsaturated polyester resin (UPR). The mechanical properties, curing degree, component distribution, and structural phases of resulting blends were analyzed by a universal testing machine, differential scanning calorimeter, Raman, and scanning electron microscope/energy‐dispersive x‐ray spectroscopy (EDX), respectively. Based on the research findings, optimizing the CaCO3 gradation significantly increased the strength of the resulting blends. The average flexural strength increased by 343.5%, while the average compressive strength increased by 888.9%. The composites with an optimized gradation of filler showed a significant reduction in uncured domains, leading to an improvement in the curing degree of the composites. The interfacial defects between the optimized graded CaCO3 filler and the UPR were reduced, resulting in a uniform distribution with no visible interface. The Raman and EDX analyses show that the gradation optimization technique has successfully prevented structural phase separation and enhanced the tendency to agglomerate between CaCO3 and UPR. This study proposes an effective method for developing high‐performance UPR/CaCO3 composites with a high filler content.Highlights The optimized gradation of CaCO3 was used as filler to address the weak interaction of CaCO3 with the UPR in a high‐filled UPR/CaCO3 composite system while improving the performance of the composite. The gradation optimization of CaCO3 filler can improve the morphology and reduce the porosity of the high‐filled UPR composites. The gradation optimization of CaCO3 filler can effectively improve the curing effect of UPR. Optimizing the CaCO3 gradation resulted in a significant increase in the average flexural strength (by 343.5%) and average compressive strength (by 888.9%) of the resulting blends.

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Preparation, characterization, and properties of polyethylene composites highly filled with calcium carbonate through co‐rotating conical twin‐screw extrusion

Cited by 5 publications

References 24 publications

Polyethylene‐g‐starch nanoparticle biocomposites: Physicochemical properties and biodegradation studies

Polyethylene‐g‐starch nanoparticle biocomposites: Physicochemical properties and biodegradation studies

An Overview of Extrusion as a Pretreatment Method of Lignocellulosic Biomass

Effect of inorganic particles gradation on the properties of high‐filled unsaturated polyester resin/CaCO₃ composites

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Preparation, characterization, and properties of polyethylene composites highly filled with calcium carbonate through co‐rotating conical twin‐screw extrusion

Cited by 5 publications

References 24 publications

Polyethylene‐g‐starch nanoparticle biocomposites: Physicochemical properties and biodegradation studies

Polyethylene‐g‐starch nanoparticle biocomposites: Physicochemical properties and biodegradation studies

An Overview of Extrusion as a Pretreatment Method of Lignocellulosic Biomass

Effect of inorganic particles gradation on the properties of high‐filled unsaturated polyester resin/CaCO3 composites

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Product

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Effect of inorganic particles gradation on the properties of high‐filled unsaturated polyester resin/CaCO₃ composites