A strategy of precipitated calcium carbonate (CaCO3) fillers for enhancing the mechanical properties of polypropylene polymers

Thriveni, Thenepalli; Jun, Ahn Young; Han, Choon; Ramakrishna, Chilakala; Ahn, Ji Whan

doi:10.1007/s11814-015-0057-3

Cited by 97 publications

(50 citation statements)

References 64 publications

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“…Using X‐ray energy dispersive spectrometry, they imaged bromine‐rich sites (a marker of brominated flame retardant additives) on microparticles in indoor dust samples from homes and vehicles. The particles themselves consisted of a calcium‐containing acrylic polymer (calcium carbonate is a common polymer filler; Thenepalli et al, ).…”

Section: Microplastics In the Indoor And Terrestrial Environmentmentioning

confidence: 99%

A Global Perspective on Microplastics

Hale¹,

Seeley²,

Guardia³

et al. 2020

JGR Oceans

733

270

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Society has become increasingly reliant on plastics since commercial production began in about 1950. Their versatility, stability, light weight, and low production costs have fueled global demand. Most plastics are initially used and discarded on land. Nonetheless, the amount of microplastics in some oceanic compartments is predicted to double by 2030. To solve this global problem, we must understand plastic composition, physical forms, uses, transport, and fragmentation into microplastics (and nanoplastics). Plastic debris/microplastics arise from land disposal, wastewater treatment, tire wear, paint failure, textile washing, and at-sea losses. Riverine and atmospheric transport, storm water, and disasters facilitate releases. In surface waters plastics/microplastics weather, biofoul, aggregate, and sink, are ingested by organisms and redistributed by currents. Ocean sediments are likely the ultimate destination. Plastics release additives, concentrate environmental contaminants, and serve as substrates for biofilms, including exotic and pathogenic species. Microplastic abundance increases as fragment size decreases, as does the proportion of organisms capable of ingesting them. Particles <20 μm may penetrate cell membranes, exacerbating risks. Exposure can compromise feeding, metabolic processes, reproduction, and behavior. But more investigation is required to draw definitive conclusions. Human ingestion of contaminated seafood and water is a concern. Microplastics indoors present yet uncharacterized risks, magnified by the time we spend inside (>90%) and the abundance of polymeric products therein. Scientific challenges include improving microplastic sampling and characterization approaches, understanding long-term behavior, additive bioavailability, and organismal and ecosystem health risks. Solutions include improving globally based pollution prevention, developing degradable polymers and additives, and reducing consumption/expanding plastic reuse.

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Section: Microplastics In the Indoor And Terrestrial Environmentmentioning

confidence: 99%

A Global Perspective on Microplastics

Hale¹,

Seeley²,

Guardia³

et al. 2020

JGR Oceans

733

270

View full text Add to dashboard Cite

show abstract

“…18 CaCO 3 used in the plastic industry leads to a decrease in surface energy, opacity and surface gloss. 19 The impact strength, elongation at break and stiffness of polymer can be increased with using calcium carbonate with the suitable particle size. 19 CaCO 3 exhibits three polymorphic forms; vaterite, aragonite, and calcite, listed in order of increasing stability.…”

Section: Introductionmentioning

confidence: 99%

“…19 The impact strength, elongation at break and stiffness of polymer can be increased with using calcium carbonate with the suitable particle size. 19 CaCO 3 exhibits three polymorphic forms; vaterite, aragonite, and calcite, listed in order of increasing stability. 18 While calcite is the most thermo-dynamically stable form of calcium carbonate, vaterite and aragonite are thermodynamically unstable forms of calcium carbonate.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the impact strength, elongation at break and stiffness can be increased with using calcite having the suitable particle size. 19 Organic and inorganic fillers have been used in polymeric materials for many years to modify properties, reduce material costs and improving the processing. It is known that understanding the effect of the shape, volume fraction, size and dispersion of particles on the composite's properties is really important.…”

Section: Introductionmentioning

confidence: 99%

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Oxygen Barrier and Thermomechanical Properties of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) Biocomposites Reinforced with Calcium Carbonate Particles

Kırboğa

Öner

2020

ACSi

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This study aimed to prepare poly (3-hydroxybutyrate-co-3-hydroxyvalerate), biocomposites with incorporating various percentages of calcium carbonate using extrusion processing. Calcium carbonate was synthesized in the absence and presence of poly(vinyl sulfonic acid). The polymorph and morphology of calcium carbonate chanced with the introduction of poly(vinyl sulfonic acid). The rhombohedral calcite was obtained in the absence of poly(vinyl sulfonic acid). Rhombohedral calcite transformed into spherical vaterite with the addition of poly(vinyl sulfonic acid). The influence of filler contents on the properties of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) composites was studied. The structure and properties of poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/ calcium carbonate biocomposites were investigated by XRD, FTIR, TGA, DSC, SEM, OTR and DMA. The nucleation effect of the calcium carbonate on the crystallization of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) was observed in the DSC and XRD measurements by increasing crystallinity of poly (3-hydroxybutyrate-co-3-hydroxyvalerate). It was shown that the variation of the barrier properties of biocomposites was influenced by polymorph and morphology of calcium carbonate. The addition of 0.5 wt% of the rhombohedral calcite and spherical vaterite increased the barrier properties by 25% and 12%, respectively compared to neat polymer. The dynamic mechanical properties of composites based on rhombohedral calcite and spherical vaterite in poly (3-hydroxybutyrate-co-3-hydroxyvalerate) matrix were investigated. The storage modulus increases by adding both particles in the composites over a wide range of temperature (-30 to 150 °C) where the reinforcing effect of calcite and vaterite was confirmed. At the same loading level, rhombohedral calcite led to more increase in the storage modulus, while less increase in storage modulus was observed in the presence of spherical vaterite particles.

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“…1 Although calcium carbonate is an abundant naturally occurring mineral already largely used in the polymer industry, recently the clever manipulation of particle size and its effects on the material properties has attracted considerable attention. [2][3][4][5][6][7][8][9][10][11][12] Nano-and micrometer calcium carbonate particles can be synthesized by a variety of methods, including controlled gas diffusion, colloidal/microemulsion systems, sonochemistry, hydrothermal synthesis, etc. The simplest approach consists of the precipitation of calcium carbonate from solutions containing inorganic salts as a source of calcium(II) and carbonate ions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Submicrometer Calcium Carbonate Particles from Inorganic Salts Using Linear Polymers as Crystallization Modifiers

Facchinetto

Bortolotto

Neumann

et al. 2016

Journal of the Brazilian Chemical Society

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In this study, we report the synthesis of submicrometer calcium carbonate particles using the simplest approach of mixing solutions of calcium chloride and ammonium carbonate inorganic precursors in the presence of crystallization modifiers. Instead of the typical crystallization of CaCO 3 into large calcite crystals with rhombohedral morphology, very small uniform spherical vaterite particles were formed with the addition of small amounts of the anionic homopolymer poly(sodium 4-styrenesulfonate) (PSS). In contrast, large spheres made of a collection of calcite polycrystallite aggregates formed in the presence of poly(acrylic acid) (PAA). Crystal growth in a pre-organized environment created by the selective distribution of Ca II ions in the shell of polyestyrene-b-poly(acrylic acid) (PS-b-PAA) core-shell spherical micelles revealed a rather poor control of the size and morphology. Therefore, the PSS anionic homopolymer can be applied to the synthesis of submicrometer CaCO 3 particles from solutions of inorganic salts, which is a much cheaper and sustainable method than controlled CO 2 gas production and diffusion.

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A strategy of precipitated calcium carbonate (CaCO3) fillers for enhancing the mechanical properties of polypropylene polymers

Cited by 97 publications

References 64 publications

A Global Perspective on Microplastics

A Global Perspective on Microplastics

Oxygen Barrier and Thermomechanical Properties of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) Biocomposites Reinforced with Calcium Carbonate Particles

Synthesis of Submicrometer Calcium Carbonate Particles from Inorganic Salts Using Linear Polymers as Crystallization Modifiers

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