scholarly journals Preparation and Characterization of HPMC/PVP Blend Films Plasticized with Sorbitol

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
H. Somashekarappa ◽  
Y. Prakash ◽  
K. Hemalatha ◽  
T. Demappa ◽  
R. Somashekar
Keyword(s):  
Mechanical Properties ◽  
Hydroxypropyl Methylcellulose ◽  
Solution Casting ◽  
Casting Method ◽  
Elongation At Break ◽  
X Ray ◽  
Blend Films ◽  
X Ray Scattering ◽  
Solution Casting Method

The aim of this present work is to investigate the effect of plasticizers like Sorbitol on microstructural and mechanical properties of hydroxypropyl methylcellulose (HPMC) and Polyvinylpyrrolidone (PVP) blend films. The pure blend and plasticized blend films were prepared by solution casting method and investigated using wide angle X-ray scattering (WAXS) method. WAXS analysis confirms that the plasticizers can enter into macromolecular blend structure and destroy the crystallinity of the films. FTIR spectra show that there are a shift and decrease in the intensity of the peaks confirming the interaction of plasticizer with the blend. Mechanical properties like tensile strength and Young’s Modulus decrease up to 0.6% of Sorbitol content in the films. Percentage of elongation at break increases suggesting that the plasticized films are more flexible than pure blend films. These films are suitable to be used as environmental friendly and biodegradable packaging films.

scholarly journals FTIR spectroscopy characterization and critical comparison of poly(vinyl)alcohol and natural hydroxyapatite derived from fish bone composite for bone-scaffold

2021 ◽  
Vol 2120 (1) ◽  
pp. 012004
Author(s):  
May Teng Hooi ◽  
Siew Wei Phang ◽  
Hui Ying Yow ◽  
Edmund David ◽  
Ning Xin Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Vinyl Alcohol ◽  
Fish Bone ◽  
Poly Vinyl Alcohol ◽  
Solution Casting ◽  
Casting Method ◽  
Elongation At Break ◽  
Solution Casting Method ◽  
Extrusion Method

Abstract This paper presents the interaction comparison of poly(vinyl) alcohol (PVA) with hydroxyapatite derived from Spanish Mackerel (SM) and Whitefin Wolf Herring (WWH) bones, in different processing method. PVA filament and solution casting method illustrated higher crystallinity in the FTIR graph as compared to the PVA pellet and filament extrusion method. Besides, minimal interactions between PVA with glycerol and HAp was observed as well. PVA pellet and solution casting method portrait higher interaction as compared to the PVA filament and extrusion method. As for the HAp of SM and WWH, WWH had higher crystallinity and better cell adhesion with a higher Ca/P ratio while SM had relatively better mechanical strength with Ca/P ratio near to stoichiometric value. The loading of HAp (0, 2.5, 5, 10, 20, 30%) does not affect interactions of PVA/HAp composite in FTIR, and thermal properties in TGA. However, it caused an increase in crystallinity at low HAp loading and decreased at higher loading of HAp above 10%. Upon addition of HAp, tensile strength increased and elongation at break decreased. As the loading of HAp increased, both mechanical properties decreased. Scaffold with WWH composite possessed lower tensile strength and higher elongation at break than SM composite. The result of mechanical properties corresponded to the SEM result. ANOVA analysis justified the effect of HAp variations and loading on the mechanical properties of the composite was prominent.

scholarly journals The Effect of Stereocomplex Polylactide Particles on the Stereocomplexation of High Molecular Weight Polylactide Blends

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2018
Author(s):  
Muhammad Samsuri ◽  
Ihsan Iswaldi ◽  
Purba Purnama
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
High Molecular Weight ◽  
Nucleating Agent ◽  
Solution Casting ◽  
Casting Method ◽  
Crystalline Fraction ◽  
Crystalline Structures ◽  
Solution Casting Method

Stereocomplexation is one of several approaches for improving polylactide (PLA) properties. The high molecular weight of poly L-lactide (PLLA) and poly D-lactide (PDLA) homopolymers are a constraint during the formation of stereocomplex PLAs (s-PLAs). The presence of s-PLA particles in PLA PLLA/PDLA blends can initiate the formation of s-PLA crystalline structures. We used the solution casting method to study the utilization of s-PLA materials from high molecular weight PLLA/PDLA blends for increasing s-PLA formation. The s-PLA particles initiated the formation of high molecular weight PLLA/PDLA blends, obtaining 49.13% s-PLA and 44.34% of the total crystalline fraction. In addition, the mechanical properties were enhanced through s-PLA crystalline formation and the increasing of total crystallinity of the PLLA/PDLA blends. The s-PLA particles supported initiation for s-PLA formation and acted as a nucleating agent for PLA homopolymers. These unique characteristics of s-PLA particles show potential to overcome the molecular weight limitation for stereocomplexation of PLLA/PDLA blends.

The Effect of Ammonium Bromide on Methylcellulose Biopolymer Electrolytes for Electrical Studies

2021 ◽  
Vol 317 ◽  
pp. 426-433
Author(s):  
Siti Nurhaziqah Abd Majid ◽  
Afiqah Qayyum Ishak ◽  
Nik Aziz Nik Ali ◽  
Muhamad Zalani Daud ◽  
Hasiah Salleh
Keyword(s):  
Fourier Transform ◽  
Ammonium Bromide ◽  
Solution Casting ◽  
X Ray Diffraction ◽  
Casting Method ◽  
X Ray ◽  
Electrical Studies ◽  
Biopolymer Electrolytes ◽  
Salt Complex ◽  
Solution Casting Method

The development of biopolymer electrolytes based on methylcellulose (MC) has been accomplished by incorporating ammonium bromide (NB) to the polymer-salt system. The biopolymer electrolytes were prepared via solution-casting method. The conductivity and permittivity characteristics of the material were studied. The biopolymer-salt complex formation have been analysed through Fourier Transform Infrared (FTIR) spectroscopy and X-ray diffraction (XRD). The conductivity of the sample was measured by EIS HIOKI. Upon addition of 20 wt.% of NB, highest conductivity of 3.25×10-4 μScm-1 was achieved at ambient temperature. The temperature dependence of the biopolymer electrolytes exhibit Arrhenius behaviour. This result had been further proven in FTIR study.

Preparation and Characterization of Starch/PVA Blend for Biodegradable Packaging Material

2010 ◽  
Vol 123-125 ◽  
pp. 351-354 ◽  
Author(s):  
Fahmida Parvin ◽  
Md. Arifur Rahman ◽  
Jahid M.M. Islam ◽  
Mubarak A. Khan ◽  
A.H.M. Saadat
Keyword(s):  
Mechanical Properties ◽  
Packaging Material ◽  
Rice Starch ◽  
Packaging Materials ◽  
Casting Method ◽  
Environment Friendly ◽  
Elongation At Break ◽  
Biodegradable Packaging ◽  
Soil And Water

Polymer films of rice starch/Polyvinyl alcohol (PVA) were prepared by casting method. Different blends were made varying the concentration of rice starch and PVA. Tensile strength (TS) and elongation at break (Eb) of the prepared films were studied. Films made up of rice starch and PVA with a ratio of 2:8 showed highest TS. 10% sugar was added with highest TS giving four composition of Starch/PVA blend in order to increase TS and Eb. Films made up of rice starch and PVA and sugar with a ratio of 1:8:1 showed highest TS and Eb and the recorded value was 14.96MPa and 637% respectively. The physico-mechanical properties of the prepared sugar incorporated films were improved by grafting with acrylic monomer with the aid of UV radiation. A formulation was prepared with monomer, methylmethacrylat in methanol, and a photo initiator. The highest TS of the grafted films were recorded and the value was 16.38 MPa. The water uptake and weight loss in both soil and water of the grafted films are lower than the non-grafted films. The prepared films were further characterized with stereo micrograph and XRD. Finally, the produced film can be used as biodegradable packaging materials for shopping and garbage bags that are very popular and environment friendly.

scholarly journals Preparation, Physicochemical Characterization, and Microrobotics Applications of Polyvinyl Chloride- (PVC-) Based PANI/PEDOT: PSS/ZrP Composite Cation-Exchange Membrane

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Mohd Imran Ahamed ◽  
Inamuddin ◽  
Abdullah M. Asiri ◽  
Mohammad Luqman ◽  
Lutfullah
Keyword(s):  
Physicochemical Characterization ◽  
Solution Casting ◽  
Polystyrene Sulfonate ◽  
X Ray Diffraction ◽  
Casting Method ◽  
X Ray ◽  
Solution Casting Method ◽  
Exchange Membrane ◽  
Differential Thermogravimetry ◽  
Aniline Polymerization

Poly(3,4-ethylene dioxythiophene): polystyrene sulfonate (PEDOT: PSS) zirconium(IV) phosphate (ZrP) based ionomeric membrane was prepared by a solution-casting method. Subsequently, aniline polymerization was carried out on the surface of the membrane by oxidative chemical polymerization. It was characterized by thermogravimetric analysis/differential thermal analysis/differential thermogravimetry (TGA/DTA/DTG), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, and Fourier-transform infrared (FTIR) spectroscopy. The membrane was also characterized by ion-exchange properties. The tip displacement investigation of the ionomeric membrane was also carried out. The outcomes demonstrated that the manufactured ionomeric membrane could produce generative strengths (tip powers), and consequently create good displacement. In this manner, the proposed ionomeric membrane was found proper for bending movement actuator that will give a successful and promising stage for smaller-scale mechanical applications.

Preparation and characterization of PVA/PAM/NH4SCN polymer film by ultrasound-assisted solution casting method for application in electric double layer capacitor

Ionics ◽  
2020 ◽  
Vol 26 (8) ◽  
pp. 4113-4128 ◽  
Author(s):  
Ashwini Swaminathan ◽  
Ranjithkumar Ravi ◽  
M. Sasikumar ◽  
Mahadevaiah Dasaiah ◽  
G. Hirankumar ◽  
...  
Keyword(s):  
Polymer Film ◽  
Double Layer ◽  
Electric Double Layer ◽  
Electric Double Layer Capacitor ◽  
Solution Casting ◽  
Casting Method ◽  
Double Layer Capacitor ◽  
Solution Casting Method ◽  
Ultrasound Assisted

The crystallization behaviors and mechanical properties of poly(l-lactic acid)/magnesium oxide nanoparticle composites

RSC Advances ◽  
2016 ◽  
Vol 6 (50) ◽  
pp. 43855-43863 ◽  
Author(s):  
Junping Jia ◽  
Jinjun Yang ◽  
Yun Zhao ◽  
Hui Liang ◽  
Minfang Chen
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Magnesium Oxide ◽  
Solution Casting ◽  
Casting Method ◽  
Oxide Composite ◽  
Solution Casting Method ◽  
Oxide Nanoparticle ◽  
Surface Modified ◽  
Nanoparticle Composites

Nanocomposites of biodegradable PLLA and magnesium oxide composite (PLLA/MgO-NPs) and surface modified magnesium oxide composite (PLLA/m-MgO-NPs) were prepared using a solution casting method.

scholarly journals The electrical and mechanical properties of Cadmium chloride reinforced PVA:PVP blend films

2020 ◽  
Vol 12 ◽  
pp. 120006
Author(s):  
Rana S. Mahmood ◽  
Sabah A. Salman ◽  
Nabeel Ali Bakr
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Polymer Blend ◽  
Weight Ratio ◽  
Experimental Results ◽  
Casting Method ◽  
Ac Electrical Conductivity ◽  
Elongation At Break ◽  
Blend Films ◽  
Reinforced Polymer

In this study, pure polymer blend (PVA:PVP) film and salt (CdCl2·H2O) reinforced polymer blend films were prepared at different weight ratios (10 wt%, 20 wt%, 40 wt%) using the casting method. The effect of the salt weight ratio on the dielectric properties of the polymer blend films reinforced by CdCl2·H2O salt were investigated, and the experimental results showed that the dielectric constant and the dielectric loss factor decreased as the frequency increased for all polymer blend films. Moreover, the above-mentioned properties increased with increasing salt weight ratios at the same frequency. The experimental results also showed an increase in AC electrical conductivity with increasing frequency, for all polymer blend films, and the AC electrical conductivity also increased with an increase in the weight ratio of the salt at the same frequency. The effect of the salt weight ratio on the mechanical properties of the salt-reinforced PVA:PVP polymer blend films was also studied. The experimental results obtained from the tensile test of the salt-reinforced polymer blend films show significant change in the values of tensile strength, elongation at break, and Young’s modulus with increasing salt weight ratios; the hardness value first increases then decreases with increasing salt weight ratios, and the fracture energy value increases with increasing salt weight ratios, thus they could be good candidates for hard adhesives with low flexibility.

Sign in / Sign up

Export Citation Format

Share Document