Influence of different β-nucleating agent on crystallization behavior, morphology, and melting characteristic of multiwalled carbon nanotube-filled isotactic polypropylene nanocomposites

Chen, Chunyan; Zhang, Zishou; Ding, Qian; Wang, Chunguang; Mai, Kancheng

doi:10.1002/pc.22981

Cited by 24 publications

(15 citation statements)

References 50 publications

(50 reference statements)

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“…b nucleating agents continue as the main route to obtain b-phase in isotactic polypropylene. Several authors have studied different kinds of nucleating agents, such as multiwalled carbon nanotubes modified with calcium pimelate supported on nano CaCO 3 [25], monoglycerolates [26], and potassium salts [27]. In these works all of them exhibit interesting properties related to the b-phase present in the composites studied.…”

Section: Introductionmentioning

confidence: 98%

Effective method for the synthesis of pimelic acid/TiO2 nanoparticles with a high capacity to nucleate β-crystals in isotactic polypropylene nanocomposites

et al. 2015

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Functionalized titanium dioxide (TiO 2 ) nanospheres with pimelic acid (TiO 2 -PA) were synthesized through a novel and effective route, where the goal was to promote a high percentage of b-crystal into a matrix of isotactic polypropylene (iPP) by the use of low amount of nucleating agent. The successful chemical attachment of pimelic acid onto the TiO 2 surface was indicated by the presence of a new band at 1575 cm -1 and an increase in the thermal stability of the PA of approximately 200°C, which were observed through infrared spectra and thermogravimetric techniques, respectively. The iPP nanocomposite was analyzed by differential scanning calorimetry and wide-angle X-ray diffraction in order to identify b-crystals. An exothermic peak at 152°C and a diffraction peak at 2h = 16.2°confirmed the ability of the TiO 2 -PA nanoparticles to promote the b-crystal phase in the iPP nanocomposite even at low percentages (0.1 % w/w).About 85 % of b-crystal content was promoted with the TiO 2 -PA particles, that was significantly higher than the 25 % obtained by unmodified TiO 2 particles. Moreover, from visco-elastic analysis, it is evident that TiO 2 -PA particles help to improve the dissipation energy by effect of the promoted b-crystal phase in the polymer composites. Likewise, the AFM images provide evidence of the incompatibility of TiO 2 particles with the iPP matrix showing protruding reliefs in comparison with the homogeneous topography of the iPP/TiO 2 -PA composite. This results were confirmed by SEM, where the exclusion of TiO 2 particles was evident.

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Section: Introductionmentioning

confidence: 98%

Effective method for the synthesis of pimelic acid/TiO2 nanoparticles with a high capacity to nucleate β-crystals in isotactic polypropylene nanocomposites

et al. 2015

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“…In previous literature, various β ‐NAs have been reported, such as: γ ‐quinacridone E3B, Indigosol Grey IBL and Cibantine Blue 2B pigments, calcium salts of suberic or pimelic acid, calcium tetrahydrophthalate, dicyclohexylterephthalamide, p ‐cyclohexylamidecarboxybenzene, the most commonly used N , N ′‐dicyclohexylnaphthalene‐2,6‐dicarboxamide and others …”

Section: Introductionmentioning

confidence: 99%

Novel polypropyleneβ‐nucleating agent with polyhedral oligomeric silsesquioxane core: synthesis and application

Barczewski

Dobrzyńska‐Mizera

Dutkiewicz

et al. 2016

Polymer International

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Synthesis and nucleation ability of a novel silsesquioxane‐based β‐nucleating agent for isotactic polypropylene (iPP) are presented. A silsesquioxane cage (POSS) was octa‐functionalized with a commercially used nucleating agent, namely N2,N6‐dicyclohexylnaphthalene‐2,6‐dicarboxamide (NU‐100), and used as a carrier with the ability to promote crystallization of β‐phase in polypropylene matrix. Presented results include the synthesis route of the β‐nucleating agent (SF‐B01) and a description of its nucleation ability in iPP. The influence of SF‐B01 on iPP matrix was examined using differential scanning calorimetry, wide‐angle X‐ray scattering and static tensile tests. Investigations were complemented with polarized light optical microscopy upon non‐isothermal crystallization of composites as well as scanning electron microscopy to qualitatively assess the filler distribution. Polypropylene samples modified with different amounts of NU‐100 were used as reference. Modification carried out with both nucleating agents reveals their comparable efficiency, i.e. a structure rich in β‐phase is obtained in both cases. © 2016 Society of Chemical Industry

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“…(2) Introducing the β‐crystal to iPP. The β‐crystal has several advantages over α‐crystal, such as improved elongation at break and impact strength . However, the addition of β‐NA also decreases the corresponding tensile strength and modulus slightly .…”

Section: Introductionmentioning

confidence: 99%

Hierarchic structure and mechanical property of glass fiber reinforced isotactic polypropylene composites molded by multiflow vibration injection molding

Wang

et al. 2015

Polymer Composites

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Maleic anhydride‐grafted polypropylene (Ma‐PP) and β nucleation agents (β‐NA) were used to modify the glass fiber (GF)/isotactic polypropylene (iPP) composite. The interface adhesion, degree of orientation, and crystalline morphologies of the PP/GF composites molded by multiflow vibrate‐injection molding (MFVIM) and conventional injection molding (CIM) were studied by polarized light microscopy (PLM), scanning electronic microscopy (SEM), and X‐ray measurements. Results prove that the interface adhesion was improved by the Ma‐PP; γ crystal was generated by the MFVIM due to the instant high pressure and shear during the multiflow; and a hierarchical structure which has a strengthened skin and a toughened core was formed. As a result, the final PP/GF/β‐NA composite has a 60% increase in tensile strength and 80% improvement in impact strength compare with the CIM pure PP/GF composite. Based on the observations, a modified model is proposed to interpret the strengthening and toughening mechanism. Our work paves the way to obtain high‐performance GF/iPP composites. POLYM. COMPOS., 38:2707–2717, 2017. © 2015 Society of Plastics Engineers

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Influence of different β-nucleating agent on crystallization behavior, morphology, and melting characteristic of multiwalled carbon nanotube-filled isotactic polypropylene nanocomposites

Cited by 24 publications

References 50 publications

Effective method for the synthesis of pimelic acid/TiO2 nanoparticles with a high capacity to nucleate β-crystals in isotactic polypropylene nanocomposites

Effective method for the synthesis of pimelic acid/TiO2 nanoparticles with a high capacity to nucleate β-crystals in isotactic polypropylene nanocomposites

Novel polypropyleneβ‐nucleating agent with polyhedral oligomeric silsesquioxane core: synthesis and application

Hierarchic structure and mechanical property of glass fiber reinforced isotactic polypropylene composites molded by multiflow vibration injection molding

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