Investigation on miscibility, thermal, crystallographic diffraction and dynamic-mechanical properties of poly(vinyl alcohol)/poly(vinylpyrrolidone)/zirconium phosphate nanocomposites

Freitas, Daniela F. S.; Mattos, Gabriela C.; Mendes, Luís Claudio

doi:10.1007/s10973-020-09599-7

Cited by 8 publications

(4 citation statements)

References 58 publications

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“…44 Additionally, the polymers miscibility degree was determined through the Equation 4 and 5 taken from elsewhere. 37,[45][46][47] The acronyms and definitions of Equations 4 and 5 are summarized in Table 1.…”

Section: Characterizationmentioning

confidence: 99%

“…Additionally, they are used as fillers to achieve nanocomposites with improved properties. [36][37][38][39][40] The effect of polycaprolactone and nano titanium phosphate, pristine (TiP) and Jeffamine™ modified (JETiP) on the polypropylene matrix was performed. Thermal, crystallographic, dynamic-mechanical and molecular mobility characteristics were assessed.…”

Section: Introductionmentioning

confidence: 99%

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Influence of polycaprolactone and titanium phosphate in the composites based upon recycled polypropylene

Quinelato

Albitres

Mariano

et al. 2020

Journal of Thermoplastic Composite Materials

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The influence of polycaprolactone (PCL) and nano titanium phosphate, pristine (TiP) and Jeffamine™ modified (JETiP), was investigated in composites derived from recycled polypropylene/polycaprolactone/titanium phosphate (PPr/PCL/TiP and PPr/PCL/JETiP). The TiP was synthesized and chemically modified with amine and the composite processed in a Haake rheometer. Improvement of PPr thermal stability was revealed. Reduction of PPr cooling crystallization temperature (9°C) and crystallinity degree (∼5–10%) were registered. Hydrogen nuclear magnetic resonance time domain revealed enhance of molecular mobility which was associated to the diminution of PPr crystallinity. The X-ray diffraction pattern of the composite PPr/PCL/JETiP did not show phosphate diffraction angle. It was understood as polymer intercalation into modified titanium phosphate galleries. At low temperature, the storage modulus increased by the presence of PCL and phosphates evidencing reinforcement. Both PPr/PCL/TiP and PPr/PCL/JETiP composites yielded phase separation systems revealed by two peaks in the loss modulus curves. Also, the high PPr participation effectiveness degree on the PCL-rich phase was understood as owing to the interaction between PCL and phosphates.

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Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of polycaprolactone and titanium phosphate in the composites based upon recycled polypropylene

Quinelato

Albitres

Mariano

et al. 2020

Journal of Thermoplastic Composite Materials

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“…This work is addressed to the objectives of 2030 Agenda released by United Nations concerning economic, social, and environmental sustainability. [14][15][16][17][18]…”

Section: Introductionmentioning

confidence: 99%

Post-consumer high density polyethylene/zirconium phosphate and aluminum hydroxide composites: Assessment of physico-mechanical and flame retardancy properties

Albitres,

Garcia,

Soares

et al. 2024

Journal of Composite Materials

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Regarding environmental preservation, the upcycling of plastics from petroleum source is a consistent alternative. This work intended to investigate melting extruded composites of post-consumer HDPE (rHDPE) filled with pristine zirconium phosphate (ZrP), aluminum hydroxide [Al(OH)3] and aluminum hydroxide modifying-zirconium phosphate [ZrPOct/Al(OH)3]. Physico-mechanical and flame retardancy were assessed. FTIR revealed that rHDPE brought some degree of oxidative degradation probably from its cleaning process and/or processing. By nuclear magnetic resonance at time domain, rHDPE showed three relaxation domains. Fillers induced the lowering of rHDPE relaxation time owing to polymer/filler by hydrogen bonds. Diffraction pattern of rHDPE/Al(OH)3 and rHDPE/ZrPOct/Al(OH)3 indicated better fillers’ dispersion. Fillers changed rHDPE crystallinity degree and thermal stability but rheologic properties were invariable. For all composites, elastic modulus increased (up to 17%) indicating stiffening. Yield strength did not change but stress and strain at break decreased. For the composites, SEM/EDS showed better dispersion and distribution of ZrP and ZrPOct/Al(OH)3 particles. It was assumed that ZrP and ZrPOct/Al(OH)3 greatly increased the flame retardancy. The work corroborates the importance of polymers’ upcycling, and it is in consonance with the objectives of 2030 Agenda released by United Nations.

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“…The authors reported that PVAl thermal properties were reduced and the reinforcing effect of ZrP. 17 Quinelato et al 18 studied the influence of polycaprolactone/titanium phosphate compound on the properties of recycled polypropylene. It was deduced that polymer intercalation inside titanium phosphate galleries, TiP acted as reinforcing agent and phase separation system were attained.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, thermal, rheological assessment of polyamide-6 reinforced composites by addition of lamellar zirconium phosphate

Freitas

Albitres

Mariano

et al. 2022

Journal of Thermoplastic Composite Materials

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The improvement of properties has been pursued through the addition of an immense variety of fillers in polymers. In this work we studied the effect of lamellar zirconium phosphate (ZrP) on the physico-mechanical properties of polyamide-6 (PA-6). The ZrP was synthesized and incorporated into PA-6 matrix at 1, 2 and 3 wt.%. Structural, thermal, relaxometric, tensile, melt flow and rheologic characteristics were assessed. Thermogravimetry indicated a low influence of the filler on thermal stability. The deconvolution of the melting peaks indicated transformation of the PA-6 α to γ phase and increase in crystallinity degree. Sample with 1 wt.% of ZrP showed an additional peak at higher relaxation time indicating restriction of polymer molecular mobility. By infrared, amine and carbonyl indices evaluation suggested ZrP interfered on the PA-6 hydrogen bonds. The elastic modulus increased slightly for all composition. Melt flow rate decreased with the amount of ZrP. The composite with 1 wt.% of ZrP exhibited the highest storage modulus and shear thinning effect noticed in the complex viscosity.

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Investigation on miscibility, thermal, crystallographic diffraction and dynamic-mechanical properties of poly(vinyl alcohol)/poly(vinylpyrrolidone)/zirconium phosphate nanocomposites

Cited by 8 publications

References 58 publications

Influence of polycaprolactone and titanium phosphate in the composites based upon recycled polypropylene

Influence of polycaprolactone and titanium phosphate in the composites based upon recycled polypropylene

Post-consumer high density polyethylene/zirconium phosphate and aluminum hydroxide composites: Assessment of physico-mechanical and flame retardancy properties

Mechanical, thermal, rheological assessment of polyamide-6 reinforced composites by addition of lamellar zirconium phosphate

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