Preparation and thermal property of ultrahigh molecular weight polyethylene composites filled by calcium carbonate modified with long chain

Wu, Zexiong; Zhang, Zishou; Mai, Kancheng

doi:10.1177/0892705718807955

Cited by 12 publications

(7 citation statements)

References 38 publications

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“…It can also be seen the crystallization enthalpy of PEW-g-CaCO 3 /UHMWPE is higher than that of AA-CaCO 3 /UHMWPE, CaCO 3 / UHMWPE and UHMWPE at cooling rate of 5°C min -1 . In our previous work [36], it is found that the oligomer-modified CaCO 3 can improve the processability of UHMWPE. It is suggested that the presence of oligomer in the surface of PEW-g-CaCO 3 is benefit to the mobility of molecular chain of UHMWPE to increase the degree of crystallization.…”

Section: Resultsmentioning

confidence: 93%

Non-isothermal crystallization kinetics of UHMWPE composites filled by oligomer-modified CaCO3

Zhang

Mai

2019

J Therm Anal Calorim

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The processability of ultrahigh molecular weight polyethylene (UHMWPE) improved by oligomer-modified calcium carbonate (CaCO 3) was observed in our previous work. In order to understand the effect of oligomer-modified CaCO 3 on the crystallization of UHMWPE, the non-isothermal crystallization behavior and crystallization kinetics of UHMWPE composites filled by oligomer-modified CaCO 3 was studied by differential scanning calorimetry in this work. Jeziorny and Mo methods were used to describe the non-isothermal crystallization kinetics of UHMWPE composites. The effect of modified filler content and cooling rate on the crystallization temperature and crystallization rate was discussed. The heterogeneous nucleation of modified CaCO 3 slightly increases the crystallization temperature of UHMWPE. The crystallization enthalpy of UHMWPE composites is significantly higher than that of UHMWPE. The crystallization rate of UHMWPE composites depends on the filler contents and cooling rate.

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Section: Resultsmentioning

confidence: 93%

Non-isothermal crystallization kinetics of UHMWPE composites filled by oligomer-modified CaCO3

Zhang

Mai

2019

J Therm Anal Calorim

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“…The CaCO 3 is a known to behave as a nucleating agent and increases the crystallinity of the polymer matrix. 32 cm −1 , CH 2 wagging at 1320-1159 cm −1 , asymmetrical -C-O-C-stretching, symmetrical -C-O-C-stretching at 800-975 cm −1 , CH 2 scissoring at 1453-1459 cm −1 , C-O stretching at 1065-1030 cm −1 and C-C stretching at 979-980 cm −1 , respectively. 33 Calcite and vaterite exhibit main characteristic peaks as 712 cm -1 and 745 cm -1 , respectively.…”

Section: Xrd and Ftir Analysis Of The Compositesmentioning

confidence: 97%

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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“…15 The mechanical properties of the composites are closely related to their macroscopic defect morphology, the particle size distribution of the filler, and the contact state of the microscopic interfaces between the fillers. [30][31][32][33] The results show that the thermoplastics filled with CaCO 3 with different particle size distributions have lower melting crystallization temperature and lower melting viscosity than the composites filled with a single particle size, which improves the machining and mechanical properties of the composites significantly. 22,[34][35][36] In a study of mica as filler-reinforced polypropylene, Busigin et al 37 noted that the modulus of the composite was related to the aspect ratio of the mica, and the strength was influenced the most by the size or scale diameter of the mica.…”

Section: Introductionmentioning

confidence: 97%

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 and thermal property of ultrahigh molecular weight polyethylene composites filled by calcium carbonate modified with long chain

Cited by 12 publications

References 38 publications

Non-isothermal crystallization kinetics of UHMWPE composites filled by oligomer-modified CaCO3

Non-isothermal crystallization kinetics of UHMWPE composites filled by oligomer-modified CaCO3

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

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

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Preparation and thermal property of ultrahigh molecular weight polyethylene composites filled by calcium carbonate modified with long chain

Cited by 12 publications

References 38 publications

Non-isothermal crystallization kinetics of UHMWPE composites filled by oligomer-modified CaCO3

Non-isothermal crystallization kinetics of UHMWPE composites filled by oligomer-modified CaCO3

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

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

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