scholarly journals Grewia optivaFiber Reinforced Novel, Low Cost Polymer Composites

2009 ◽  
Vol 6 (1) ◽  
pp. 71-76 ◽  
Author(s):  
A. S. Singha ◽  
Vijay Kumar Thakur
Keyword(s):  
Polymer Composites ◽  
Low Cost ◽  
Urea Formaldehyde ◽  
Thermal Studies ◽  
Fiber Reinforcement ◽  
Formaldehyde Resin ◽  
Fiber Analysis ◽  
The Matrix ◽  
Grewia Optiva ◽  
Analysis Of Results

In this research article, the assessment of properties of compression moldedGrewia optivafiber reinforced Urea-Formaldehyde (UF) matrix based polymer composites is reported. Reinforcing of the UF resin withGrewia optivafiber was accomplished in the particle, short and long fiber reinforcement. Present work reveals that mechanical properties such as: tensile strength, compressive strength and wear resistance of urea - formaldehyde resin increases to a significant extent when reinforced withGrewia optivafiber. Analysis of results shows that particle reinforcement is more effective as compared to short and long fiber reinforcement. Morphological and Thermal studies of the matrix and fibre reinforced biocomposites have also been carried out

scholarly journals Saccaharum Cilliare Fiber Reinforced Polymer Composites

2008 ◽  
Vol 5 (4) ◽  
pp. 782-791 ◽  
Author(s):  
A. S. Singha ◽  
Vijay Kumar Thakur
Keyword(s):  
Mechanical Properties ◽  
Urea Formaldehyde ◽  
Thermal Studies ◽  
Natural Fibers ◽  
Fiber Reinforcement ◽  
Short Fiber ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Fiber Reinforced ◽  
Fiber Reinforced Materials

Renewable resources such as natural fibers in the field of fiber reinforced materials with their new range of applications represent an important basis in order to fulfill the ecological objective of creating eco-friendly materials. In views of enormous advantages a study on green composites usingSaccaharum cilliarefiber as a reinforcing material and urea-formaldehyde (UF) as a novel matrix has been made. First of all urea-formaldehyde resin synthesized was reinforced withSaccaharum cilliarefiber. Reinforcement of the fiber was accomplished in three different forms particle (200 micron) reinforcement, short fiber (3 mm.) reinforcement and long fiber (6 mm) reinforcement. Present work reveals that mechanical properties such as: tensile strength, compressive strength and wear resistance of urea -formaldehyde resin (UF) increases to a significant extent when reinforced withSaccaharum cilliarefiber which is found in outsized amount in the Himalayan Region. These mechanical properties mainly depend upon the dimensions of the fiber used. Analysis of results shows that particle reinforcement is more effective as compared to short and long fiber reinforcement. Morphological and thermal studies of these composites have also been carried out.

scholarly journals Synthesis and Characterization of ShortSaccaharum CilliareFibre Reinforced Polymer Composites

2009 ◽  
Vol 6 (1) ◽  
pp. 34-38 ◽  
Author(s):  
A. S. Singha ◽  
Vijay Kumar Thakur
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Urea Formaldehyde ◽  
Thermal Studies ◽  
Synthesis And Characterization ◽  
Green Composites ◽  
Reinforced Polymer ◽  
The Matrix ◽  
Fibre Loading

This paper deals with the synthesis of shortSaccaharum Cilliarefibre (SC) reinforced Urea-Formaldehyde (UF) matrix based polymer composites. Present work reveals that mechanical properties such as: tensile strength, compressive strength, flexural strength and wear resistance of the UF matrix increase up to 30% fibre loading(in terms of weight) and then decreases for higher loading when fibers are incorporated into the matrix polymer. Morphological and Thermal studies of the matrix, fibre and short fibre reinforced (SF-Rnf) green composites have also been carried out. The results obtained emphasize the applications of these fibres, as potential reinforcing materials in bio based composites.

scholarly journals Selected properties of flat-pressed wood-polymer composites for high humidity conditions

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 5141-5155
Author(s):  
Piotr Borysiuk ◽  
Jacek Wikowski ◽  
Krzysztof Krajewski ◽  
Radosław Auriga ◽  
Adrian Skomorucha ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Polymer Composite ◽  
Urea Formaldehyde ◽  
Core Layer ◽  
Modulus Of Rupture ◽  
Formaldehyde Resin ◽  
High Humidity ◽  
Wood Polymer ◽  
Wood Polymer Composites ◽  
Wood Polymer Composite

This study investigated the possibility of applying flat-pressed wood-polymer composites in conditions of high humidity. The experiment involved three variants of wood-polymer composite panels 16 mm thick, and 680 kg per m3 density. The wood particles were bonded with polyethylene. The share of polyethylene in the core layer was fixed at 50%, while in the face layers the content was varied (40%, 50%, or 60%). The following parameters were examined: modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB), screw holding (SH), thickness swelling (TS), water absorption (WA), susceptibility to drilling and milling, wettability and surface free energy, and resistance to mold. The results were compared to particleboard glued with urea-formaldehyde resin. The wood-polymer composite had lower MOR and MOE values and similar IB and SH values. The panels indicated a remarkably higher water resistance (lower TS and WA values) with good surface wettability and high resistance to mold fungi. Additionally, the composites were easier to machine, e.g. drilling or milling, in comparison to standard particleboards.

scholarly journals The Influence of Compounding Parameters on the Electrical Conductivity of LDPE/Cu Conductive Polymer Composites (CPCs)

2021 ◽  
Vol 2080 (1) ◽  
pp. 012008
Author(s):  
Farah Badrul ◽  
Khairul Anwar Abdul Halim ◽  
MohdArif Anuar Mohd Salleh ◽  
Azlin Fazlina Osman ◽  
Nor Asiah Muhamad ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Polymer Composites ◽  
Low Cost ◽  
Conductive Polymer ◽  
Conductive Filler ◽  
Filler Loading ◽  
Electrically Conductive ◽  
Statistical Software ◽  
Conductive Polymer Composites ◽  
The Matrix

Abstract Low-linear density (LDPE) and copper (Cu) were used as main polymer matrix and conductive filler in order to produce electrically conductive polymer composites (CPC). The selection of the matrix and conductive filler were based on their due to its excellence properties, resistance to corrosion, low cost and electrically conductive. This research works is aimed to establish the effect of compounding parameter on the electrical conductivity of LDPE/Cu composites utilising the design of experiments (DOE). The CPCs was compounded using an internal mixer where all formulations were designed by statistical software. The scanning electron micrograph (SEM) revealed that the Cu conductive filler had a flake-like shape, and the electrical conductivity was found to be increased with increasing filler loading as measured using the four-point probe technique. The conductivity data obtained were then analysed by using the statistical software to establish the relationship between the compounding parameters and electrical conductivity where it was found based that the compounding parameters have had an effect on the conductivity of the CPC.

Study on Modification of Urea Formaldehyde Resin with Keratin

2010 ◽  
Vol 113-116 ◽  
pp. 1787-1791 ◽  
Author(s):  
Jiu Yin Pang ◽  
Chuan Sun ◽  
Shi Cheng Zhang ◽  
Hai Xing Cui
Keyword(s):  
Low Cost ◽  
Urea Formaldehyde ◽  
Formaldehyde Emission ◽  
Urea Formaldehyde Resin ◽  
Molar Ratio ◽  
Synthesis Process ◽  
Formaldehyde Resin ◽  
Low Toxicity ◽  
Modified Urea

As the main adhesive types in wood-based panel industry，urea-formaldehyde has such shortcomings as high levels of free formaldehyde content and formaldehyde emission of its bonding product. In this experiment, we try to modify urea-formaldehyde resin with keratin through copolymerization reaction. Through the determination of such reaction technology as molar ratio, adding sequence of keratin and adding amount of keratin, we finally synthesized the low toxic urea resin. The results show that the optimum molar ratio is 1.3:1, the adding amount of keratin is 5% and adding keratin after the third feeding of urea is the best choice. By optimizing the synthesis process, we ultimately get the low toxicity modified urea-formaldehyde resin. At the same time, modified urea-formaldehyde resin cost has been reduced because extensive sources of keratin and low cost.

Research Progress and Prospect of Inorganic Filler for Urea-Formaldehyde Resin Adhesive

2012 ◽  
Vol 427 ◽  
pp. 148-152 ◽  
Author(s):  
Qing Guo Tang ◽  
Fei Wang ◽  
Hong Xia Shao ◽  
Yan Ding
Keyword(s):  
Low Cost ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
Research Progress ◽  
Inorganic Filler ◽  
Formaldehyde Resin ◽  
Adhesive Properties ◽  
Resin Adhesive ◽  
Oxide Powders ◽  
Research Achievement

The artificial plywood materials were prepared using natural minerals and inorganic oxide powders as the main fillers for urea-formaldehyde resin adhesive instead of flour. The method mentioned above has advantages in saving food resources, reducing cost of plywood, improving the quality of plywood and decreasing the release amount of free formaldehyde. On the basis of the research achievement both domestic, foreign and our experimental data, this paper mainly discussed the effect of filler on adhesive properties, bond strength of plywood, and free formaldehyde content, which provided reference for development of green environmental protection and low cost urea-formaldehyde resin adhesive minerals composite filler.

scholarly journals Reference Electrodes with Polymer-Based Membranes—Comprehensive Performance Characteristics

Membranes ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 161 ◽  
Author(s):  
Peter Lingenfelter ◽  
Bartosz Bartoszewicz ◽  
Jan Migdalski ◽  
Tomasz Sokalski ◽  
Mirosław M. Bućko ◽  
...  
Keyword(s):  
Standardized Testing ◽  
Urea Formaldehyde ◽  
Reference Electrode ◽  
Ionic Species ◽  
Formaldehyde Resin ◽  
Reference Electrodes ◽  
Different Types ◽  
The Matrix ◽  
State Reference ◽  
Testing Protocols

Several types of liquid membrane and solid-state reference electrodes based on different plastics were fabricated. In the membranes studied, equitransferent organic (QB) and inorganic salts (KCl) are dispersed in polyvinyl chloride (PVC), polyurethane (PU), urea-formaldehyde resin (UF), polyvinyl acetate (PVA), as well as remelted KCl in order to show the matrix impact on the reference membranes’ behavior. The comparison of potentiometic performance was made using specially designed standardized testing protocols. A problem in the reference electrode research and literature has been a lack of standardized testing, which leads to difficulties in comparing different types, qualities, and properties of reference electrodes. Herein, several protocols were developed to test the electrodes’ performance with respect to stability over time, pH sensitivity, ionic strength, and various ionic species. All of the prepared reference electrodes performed well in at least some respect and would be suitable for certain applications as described in the text. Most of the reference types, however, demonstrated some weakness that had not been previously highlighted in the literature, due in large part to the lack of exhaustive and/or consistent testing protocols.

scholarly journals Rice Husk Filled Polymer Composites

2015 ◽  
Vol 2015 ◽  
pp. 1-32 ◽  
Author(s):  
Reza Arjmandi ◽  
Azman Hassan ◽  
Khaliq Majeed ◽  
Zainoha Zakaria
Keyword(s):  
Polymer Composites ◽  
Rice Husk ◽  
Natural Fiber ◽  
Driving Forces ◽  
Low Cost ◽  
Natural Fibers ◽  
Light Weight ◽  
Filled Polymer ◽  
Agroindustrial Waste ◽  
The Matrix

Natural fibers from agricultural wastes are finding their importance in the polymer industry due to the many advantages such as their light weight, low cost and being environmentally friendly. Rice husk (RH) is a natural sheath that forms around rice grains during their growth. As a type of natural fiber obtained from agroindustrial waste, RH can be used as filler in composites materials in various polymer matrices. This review paper is aimed at highlighting previous works of RH filled polymer composites to provide information for applications and further research in this area. Based on the information gathered, application of RH filled composites as alternative materials in building and construction is highly plausible with both light weight and low cost being their main driving forces. However, further investigations on physical and chemical treatment to further improve the interfacial adhesion with polymeric matrix are needed as fiber-polymer interaction is crucial in determining the final composite properties. Better understanding on how the used polymer blends as the matrix and secondary fillers may affect the properties would provide interesting areas to be explored.

scholarly journals Study of Mechanical Properties of Waste Biomass Reinforced Urea-Resorcinol-Formaldehyde Composites

2011 ◽  
Vol 8 (4) ◽  
pp. 1478-1489 ◽  
Author(s):  
A. S. SINGHA ◽  
B. S. Kaith ◽  
Inderjeet Kaur ◽  
Ashwarya Jyoti Khanna
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Urea Formaldehyde ◽  
Thermal Studies ◽  
Natural Fibers ◽  
Pine Needles ◽  
Formaldehyde Resin ◽  
Waste Biomass ◽  
Resorcinol Formaldehyde ◽  
High Performing

Natural fibers play an important role in developing high performing fully biodegradable composites which will be a key material to solve the current ecological and environmental problems. Due to enormous advantages of composites reinforced with natural fibers, a study on pine needles reinforced urea-resorcinol-formaldehyde composites has been made. Present investigation has revealed that urea-formaldehyde resin in 1.0: 2.5 ratio exhibits optimum mechanical behavior whereas in case urea-resorcinol- formaldehyde resin, the best mechanical behavior was shown by 1.0: 1.0: 2.5 ratios. However, reinforcing of this resin with pine-needles of 1 cm size and evaluation of their mechanical properties showed that mechanical properties increase with reinforcement. These results were further supported by theSEMand thermal studies.

scholarly journals Preparation and Properties of the Urea-Formaldehyde Res-In/Reactive Halloysite Nanocomposites Adhesive with Low-Formaldehyde Emission and Good Water Resistance

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2224
Author(s):  
Jingbiao Song ◽  
Shiwei Chen ◽  
Xibin Yi ◽  
Xinfu Zhao ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Water Resistance ◽  
In Situ Polymerization ◽  
Chemical Interaction ◽  
Low Cost ◽  
Urea Formaldehyde ◽  
Formaldehyde Emission ◽  
Wood Adhesive ◽  
Halloysite Nanotubes ◽  
Formaldehyde Resin ◽  
Sem Images

Low-cost urea formaldehyde resin (UF)/reactive halloysite nanotubes (HNTs) nanocomposite adhesive was prepared successfully via in situ polymerization. The HNTs were modified to improve its compatibility with polymer. The XRD and FTIR results showed that physical and chemical interaction between the HNTs and polymer resin influenced the structure of UF owing to the functional groups on the HNTs. It is found from SEM images that the modified HNTs could be dispersed uniformly in the resin and the nanocomposite particles were spherical. The performance experiment confirmed that thermal stability of nanocomposite increased largely, formaldehyde emission of UF wood adhesive reduced 62%, and water resistance of UF wood adhesive improved by 84%. Meanwhile, the content of HNTs on the nanocomposites could be up to 60 wt %. The mechanism of the nanocomposites based on the reactive HNTs was proposed. The approach of the preparation could supply an idea to prepare other polymer/clay nanocomposites.

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