Characterization of blend polymer PVA-PVP complexed with ammonium thiocyanate

Premalatha, M.; Vijaya, N.; Selvasekarapandian, S.; Selvalakshmi, S.

doi:10.1007/s11581-016-1672-7

Cited by 65 publications

(18 citation statements)

References 43 publications

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“…This same event was reported by J. Barrera and co-authors, wherein their thermal analysis of PVA they found a percentage of surface water between 3 -5% [52]. The PVA degradation process occurs in three steps [53]. The first occurs due to the degradation of the side chain of the polymer [54], in this case, it was identified around 225 °C with a weight loss of 2.81%.…”

Section: Physicochemical Characterizationsupporting

confidence: 79%

Formulation and Characterization of a New Injectable Bone Substitute Composed PVA/borax /CaCO3 and Demineralized Bone Matrix

Medrano-David¹,

Lopera²,

Londoño³

et al. 2021

Preprint

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The occurrence of bone-related disorders and diseases has increased dramatically in recent years around the world. Demineralized bone matrix (DBM) has been widely used as a bone implant due to its osteoinduction and bioactivity. However, the use of DBM is limited because it is a particulate material, which makes it difficult to manipulate and implant with precision, in addition, these particles are susceptible to migrate to other sites. To address this situation, DBM is commonly incorporated into a variety of carriers. An injectable scaffold has advantages over bone grafts or preformed scaffolds, such as the ability to flow and fill the bone defect. The aim of this research is to develop a DBM carrier with such viscoelastic properties to obtain an injectable bone substitute (IBS). The DBM carrier developed consisted of a PVA/glycerol network cross-linked with borax and reinforced with CaCO3 as a pH neutralizer, porosity generator, and source of Ca. The physicochemical properties were determined by the injectability test, FTIR, SEM, and TGA. Porosity, degradation, bioactivity, possible cytotoxic effect, and proliferation in osteoblasts were also determined. The results show that the developed material has great potential to be used in bone tissue regeneration

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Section: Physicochemical Characterizationsupporting

confidence: 79%

Formulation and Characterization of a New Injectable Bone Substitute Composed PVA/borax /CaCO3 and Demineralized Bone Matrix

Medrano-David¹,

Lopera²,

Londoño³

et al. 2021

Preprint

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“…In addition, the ionic conductivity of the system increased as the salt content reached to 40 wt.%. However, at 50 wt.% of NH 4 SCN salt, the value of R b increased and the conductivity decreased due to the recombination of cations and anions of the salt, which dropped the number of movable ions and slowed the motion of ions in the polymer blend network [53]. In polymer electrolytes containing ammonium salts, protons (H + ) are transported by means of the Grotthuss mechanism [54].…”

Section: Impedance Analysismentioning

confidence: 99%

Synthesis of Porous Proton Ion Conducting Solid Polymer Blend Electrolytes Based on PVA: CS Polymers: Structural, Morphological and Electrochemical Properties

et al. 2020

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In this study, porous cationic hydrogen (H+) conducting polymer blend electrolytes with an amorphous structure were prepared using a casting technique. Poly(vinyl alcohol) (PVA), chitosan (CS), and NH4SCN were used as raw materials. The peak broadening and drop in intensity of the X-ray diffraction (XRD) pattern of the electrolyte systems established the growth of the amorphous phase. The porous structure is associated with the amorphous nature, which was visualized through the field-emission scanning electron microscope (FESEM) images. The enhancement of DC ionic conductivity with increasing salt content was observed up to 40 wt.% of the added salt. The dielectric and electric modulus results were helpful in understanding the ionic conductivity behavior. The transfer number measurement (TNM) technique was used to determine the ion (tion) and electron (telec) transference numbers. The high electrochemical stability up to 2.25 V was recorded using the linear sweep voltammetry (LSV) technique.

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“…Other methods to improve the specific properties of PVA for different applications involve blending it with other polymers: with poly(vinylpyrrolidone) PVP [ 49 , 50 , 69 ] for increased thermal, electrical, mechanical stability and electrochemical properties; with polyethylene glycol (PEG) for facilitated gas transport [ 70 ], with PVAm in order to improve film formation and mechanical properties; reinforcing it with carbon nanotubes [ 52 ] or with poly(glucosyloxyethyl methacrylate) (poly(GEMA)) for the suppression of the thermal decomposition of PVA in an aqueous solution, and to increase the thermal decomposition temperature above 300 °C [ 51 ].…”

Section: Pva-synthesis and Propertiesmentioning

confidence: 99%

Metal Doped PVA Films for Opto-Electronics-Optical and Electronic Properties, an Overview

Bulinski

2021

Molecules

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Polyvinyl alcohol is unique among polymers. Apart from its preparation, it is not built up in polymerization reactions from monomers, unlike most vinyl-polymers, and it is biodegradable in the presence of suitably acclimated microorganisms. It is an environmentally friendly material for a wide range of applications, from medical ones, based on its biocompatibility, to integrated optics. This paper reviews, in addition to the preparation and optimization of films of polyvinyl alcohol doped with different metal species, the role of dopants and doping technologies in the involved electronic mechanism. The optical properties were studied by UV-VIS-IR, Mössbauer spectroscopy, and other measurement techniques, with applications such as real-time holography, microlasers, optical sensors or nanophotonics in mind.

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Characterization of blend polymer PVA-PVP complexed with ammonium thiocyanate

Cited by 65 publications

References 43 publications

Formulation and Characterization of a New Injectable Bone Substitute Composed PVA/borax /CaCO3 and Demineralized Bone Matrix

Formulation and Characterization of a New Injectable Bone Substitute Composed PVA/borax /CaCO3 and Demineralized Bone Matrix

Synthesis of Porous Proton Ion Conducting Solid Polymer Blend Electrolytes Based on PVA: CS Polymers: Structural, Morphological and Electrochemical Properties

Metal Doped PVA Films for Opto-Electronics-Optical and Electronic Properties, an Overview

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