Crystallization, mechanical properties and thermal stability of cockleshell-derived CaCO3 filled polypropylene

Thumsorn, Supaphorn; Thavarungkul, Nandh; Wong-On, J.; Leong, Yew Wei; Hamada, Hiroyuki

doi:10.1007/s10965-016-1119-x

Cited by 6 publications

(5 citation statements)

References 27 publications

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“…In turn, better mobility would also promote the dispersion of nanofillers, i.e., TAMCC. Furthermore, it could be also found that all of the DSC melting curves of neat PP, CC/PP, and TAMCC/PP manifested only a single melting peak at the temperature higher than 160 • C, which was the representative melting peak of α-PP, suggesting that the addition of CC or TAMCC could not result in the formation of any other crystal types in PP [31,35,36]. As is well known, PP can be categorized into three classes based on the crystal form, i.e., the monoclinic, trigonal, and orthorhombic types, corresponding to α-, β-, and γ-PP, respectively.…”

Section: Resultsmentioning

confidence: 94%

“…The results showed that the CS could distinctly promote the formation of β-form PP, leading to improvement in rigidity and toughness of nanocomposites. In their comparative experiment, stearic acid-treated CS would not generate the formation of β-form PP, but could significantly affect the nucleation process and therefore hindered crystallization [31]. Figure 5a shows the DSC melting curves of neat PP, CC/PP, and TAMCC/PP (both CC/PP and TAMCC/PP contain 20 wt.% nanofillers), from which the melting enthalpy (∆H m ) and melting temperature (T m ) could be collected.…”

Section: Resultsmentioning

confidence: 99%

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Synchronously Strengthen and Toughen Polypropylene Using Tartaric Acid-Modified Nano-CaCO3

Yao

Sun

et al. 2021

Nanomaterials

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In order to overcome the challenge of synchronously strengthening and toughening polypropylene (PP) with a low-cost and environmental technology, CaCO3 (CC) nanoparticles are modified by tartaric acid (TA), a kind of food-grade complexing agent, and used as nanofillers for the first time. The evaluation of mechanical performance showed that, with 20 wt.% TA-modified CC (TAMCC), the impact toughness and tensile strength of TAMCC/PP were 120% and 14% more than those of neat PP, respectively. Even with 50 wt.% TAMCC, the impact toughness and tensile strength of TAMCC/PP were still superior to those of neat PP, which is attributable to the improved compatibility and dispersion of TAMCC in a PP matrix, and the better fluidity of TAMCC/PP nanocomposite. The strengthening and toughening mechanism of TAMCC for PP involves interfacial debonding between nanofillers and PP, and the decreased crystallinity of PP, but without the formation of β-PP. This article presents a new applicable method to modify CC inorganic fillers with a green modifier and promote their dispersion in PP. The obtained PP nanocomposite simultaneously achieved enhanced mechanical strength and impact toughness even with high content of nanofillers, highlighting bright perspective in high-performance, economical, and eco-friendly polymer-inorganic nanocomposites.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Synchronously Strengthen and Toughen Polypropylene Using Tartaric Acid-Modified Nano-CaCO3

Yao

Sun

et al. 2021

Nanomaterials

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“…[ 21 ] It is easy to form a microcrack or microsilver pattern, so the impact of β crystal resistance is better and the thermal stability temperature is high. [ 22 ] However, the formation of β crystals is affected by more factors compared with α crystals, and the solids appear unstable. Surprisingly, in reports on the practical application of β nucleating agents, there have even been cases of β‐nucleating agent failure in multi‐component combinations.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of β‐nucleating agent and layered double hydroxide on high toughness of polypropylene composites

Guo

Chen

Guo³

et al. 2023

Polymer Engineering & Sci

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The crystalline behaviors and micromorphology of polymers have a large impact on the physical and mechanical properties, especially for polypropylene (PP) composites with toughening effect. In this work, the changes of the content ratio for layered double hydroxide (LDH) and β-nucleating agent (CaHA), mechanical properties, and crystallization behaviors of PP/ethylene vinyl acetate copolymer (EVA)/LDH ternary composites are investigated by differential scanning calorimeter (DSC), polarizing optical microscopy (POM), scanning electron microscopy (SEM), and notched impact strength testing. The CaHA is used for synergistic toughening with LDH, and the highest notched impact strength is achieved in the 6PEL2 sample with CaHA of 0.03 phr and LDH of 5.70 phr, which is about 100% higher than that of pure PP. It is found from the crystallization behaviors and SEM images of the composites that 6PEL2 has the highest relative content of β-crystals and the appearance of rougher interface and deformation pullout of the EVA phase in 6PEL2 because of dislocations in the β-crystals and the formation of a large number of cavities absorbing the impact energy.

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“…By introducing rigid inorganic particles, it can not only improve the stiffness and heat resistance of polymer but also reduce the production cost. Talc powder (Talc) [11], calcium carbonate (CaCO 3 ) [12,13], and glass beads [14] are generally used for filling modification, and some aspects of the performance of the PP composite modified by filling have been improved [15]. However, they are still insufficient as structural materials.…”

Section: Introductionmentioning

confidence: 99%

“…Polymers 2021, 13, 3913 2 of 13 The concept of consciously controlling the orientation and crystallization of polymer molecular chains in the molding process to improve the mechanical properties of polymers has long been put forward as so-called "self-reinforced composites" [22,23]. However, it is difficult for the molecular chains of polymers to form a highly oriented structure during traditional extrusion or the injection melting processing [24,25].…”

Section: Introductionmentioning

confidence: 99%

Effect of Drawing Parameters on the Properties of Polypropylene/Inorganic Particles Composites by Solid-State Die Drawing

et al. 2021

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Die drawing is an effective method for improving the properties of polymer. In this work, polypropylene (PP)/inorganic particle composites were fabricated by a solid-state die drawing process to investigate the effects of drawing parameters, such as inorganic particles types, drawing temperature, and drawing speed, on the thermal properties, microstructure, and mechanical behavior of the drawn composites. The mechanical properties of the material were significantly improved through this processing method. For the drawn PP/inorganic particle composites with 45 wt% CaCO3, when the drawing speed was 2.0 m/min and the drawing temperature was 110 °C, the density of the drawn composites reached the lowest at 1.00 g/cm3. At this time, the tensile strength, flexural strength, and impact strength of the drawn composites were 128.32 MPa, 77.12 MPa, and 170.42 KJ/m2, respectively. This work provides a new strategy for the preparation of lightweight and high-strength PP-based composites, which have broad application prospects in the field of engineering and structural materials.

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Crystallization, mechanical properties and thermal stability of cockleshell-derived CaCO3 filled polypropylene

Cited by 6 publications

References 27 publications

Synchronously Strengthen and Toughen Polypropylene Using Tartaric Acid-Modified Nano-CaCO3

Synchronously Strengthen and Toughen Polypropylene Using Tartaric Acid-Modified Nano-CaCO3

Synergistic effect of β‐nucleating agent and layered double hydroxide on high toughness of polypropylene composites

Effect of Drawing Parameters on the Properties of Polypropylene/Inorganic Particles Composites by Solid-State Die Drawing

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