VARIATIONS IN THE RESIN CONTENT OF VARIOUS PARTS OF PODOPHYLLUM EMODI L

1954 ◽  
Vol 6 (1) ◽  
pp. 62-65 ◽  
Author(s):  
Anwar Hussain ◽  
I. I. Chaudhri ◽  
Fateh Muhammad ◽  
A. Wahhab
Keyword(s):  
Resin Content

Effect of Processing Parameters on Properties of Wheat-Straw Boards with FRW

2011 ◽  
Vol 250-253 ◽  
pp. 947-950
Author(s):  
Xiao Dong Zhu ◽  
Feng Hu Wang ◽  
Yu Liu
Keyword(s):  
Wheat Straw ◽  
Processing Condition ◽  
Fire Retardant ◽  
Physical And Mechanical Properties ◽  
Processing Parameters ◽  
Resin Content ◽  
National Standard ◽  
Appearance Time ◽  
Uf Resin ◽  
Peak Value

This paper explored the effect of MDI, UF and FRW content on the mechanical and fire retardant property of straw based panels with surface alkali liquor processing. In order to manufacture the straw based panel with high quality, low toxic and fire retardant, the interface of wheat-straw was treated with alkaline liquid under the optimal treating condition: alkaline liquid concentration was 0.4-0.8%, alkaline dosage was 1:2.5-1:4.5, alkaline-treated time was 12h-48h.The physical and mechanical properties of wheat-straw boards after treated could satisfy the China national standard. And the variance analysis of the fire retardant property of straw based panel showed that TTI, pkHRR and peak value appearance time were not affected by the MDI, UF and FRW content significantly. The results of orthogonal test showed that the optimized processing condition was MDI content as 4%, UF resin content as 7% and the FRW content as 10%.

Preparation of High Density Graphite Materials from Coal Tar Pitch

1994 ◽  
Vol 349 ◽  
Author(s):  
Yang-Duk Park ◽  
Chul-Woo Kim ◽  
Young-Dae Seo
Keyword(s):  
Mechanical Properties ◽  
Coal Tar ◽  
Resin Content ◽  
High Density ◽  
Coal Tar Pitch ◽  
Wet Milling ◽  
Density Graphite ◽  
Milling Method

ABSTRACTPreparation of high density graphite materials from coal tar pitch was investigated. The effect of β-resin content on the mechanical properties of graphite solid prepared from semi-coke, which was prepared by wet milling method, was examined. β-Resin content was effective for fabrication of green bodies without lamination and for improving the mechanical properties of graphite materials.

scholarly journals Medium Density Fibreboard Made from Kenaf (Hibiscus cannabinus L.) Stem: Effect of Thermo-mechanical Refining and Resin Content

BioResources ◽  
2014 ◽  
Vol 9 (2) ◽  
Author(s):  
Majid Dehghan Nayeri ◽  
Paridah Md Tahir ◽  
Mohammad Jawaid ◽  
Zaidon Ashaari ◽  
Luqman Chuah Abdullah ◽  
...  
Keyword(s):  
Resin Content ◽  
Hibiscus Cannabinus ◽  
Medium Density ◽  
Medium Density Fibreboard ◽  
Mechanical Refining

Study on the Composites of Phenol Formaldehyde Resin/Graphite Reinforced by Milled Carbon Fibers for Bipolar Plates

2010 ◽  
Vol 156-157 ◽  
pp. 1090-1096
Author(s):  
Wei Qiang Wang ◽  
Ai Ju Li ◽  
Ming Ming You ◽  
Bin Xia
Keyword(s):  
Electrical Conductivity ◽  
Liquid Phase ◽  
Flexural Strength ◽  
Carbon Fibers ◽  
Phenol Formaldehyde ◽  
Resin Content ◽  
Liquid Phase Oxidation ◽  
Bipolar Plates ◽  
Air Oxidation ◽  
Phase Oxidation

Composites of phenol formaldehyde (PF) resin/graphite reinforced by milled carbon fibers (MCFs) for bipolar plates are obtained by hot compression molding. The raw materials of the MCF particles, PF resin powder and graphite powder are simply dry powder ball milled and mixed. The effects of PF resin content and the content, granularity and surface treatment methods, such as air oxidation and Fenton/ultraviolet (UV) liquid-phase oxidation of MCFs on the electrical conductivity and flexural strength of the composites are measured by methods of four-point probe technique and three point flexural test, and the fracture patterns of the composites are analyzed by scanning electron microscope (SEM). The results indicate that the electrical conductivity decreases and flexural strength increases with the increase of PF resin content. Especially, the values of electrical conductivity and flexural strength can reach 165.28 S.cm-1 and 55.11MPa respectively when the PF resin content was 17% in weight. The properties of composites reinforced by air oxidation treated MCFs are better than those by liquid-phase oxidation treated one. The electrical conductivity and flexural strength of the composites are 208.12S.cm-1 and 57.44 MPa when they reinforced by 5% MCFs which treated by air oxidation at 450 . Compared with the nonreinfoced composites, the properties of reinforced composites increase 25.92% in electrical conductivity and 4.23% in flexural strength.

scholarly journals Correlations between Main Tobacco Components and Smoke Condensate Yields / Beziehungen zwischen den Hauptbestandteilen des Cigarettentabaks und den Rauchkondensaten

1965 ◽  
Vol 3 (1) ◽  
Author(s):  
X. Binopoulos ◽  
G. Kavazis ◽  
A. G. Sficas
Keyword(s):  
Total Nitrogen ◽  
Resin Content ◽  
Soluble Carbohydrates ◽  
Protein Nitrogen ◽  
Positive Correlation ◽  
Coefficient Of Correlation ◽  
Nicotine Content ◽  
Other Substances ◽  
Reducing Substances ◽  
Smoke Yield

AbstractCigarettes with similar parameters were made from various tobaccos of definite types and sources. These were chemically defined according to nicotine, total reducing substances, soluble carbohydrates, polyphenols, total nitrogen, protein nitrogen, total ash, ethanol extractible substances, resins, ''wax'', and raw fiber. The smoke condensate was also determined. The following results were obtained from 17 different kinds of tobacco:1. A positive correlation between the resin content in the leaf and smoke condensate yield. Calculations gave a coefficient of correlation (r) of 0.69 (statistical significant (99 %)).2.The same positive correlation, with a coefficient of correlation of 0.63 (statistical significant (99 %)), was found in relation to the nicotine content of the leaf.3. Other substances determined in the leaf do not seem to be tied to smoke condensate yield.4. The same conclusions are valid when the smoke yield is measured in tars soluble in chloroform

Impacts of Molding Pressure on Performances of Kraft Fiber Reinforced Unsaturated Polyester Composites

2011 ◽  
Vol 183-185 ◽  
pp. 2173-2177 ◽  
Author(s):  
Xin Ying Lv ◽  
Die Ying Ma ◽  
Yong Ming Song ◽  
Zhen Hua Gao
Keyword(s):  
Mechanical Properties ◽  
Creep Resistance ◽  
Unsaturated Polyester ◽  
Resin Content ◽  
Molding Pressure ◽  
The Novel ◽  
Fiber Reinforced ◽  
Low Viscosity ◽  
Plastic Composite ◽  
The Many

Novel Kraft fiber reinforced unsaturated polyester (UPE) composites were prepared at various molding pressures in order to investigate the effects of molding pressure on resin content, the mechanical properties and creep resistance. The results indicated that the novel composites had much higher mechanical properties and better creep resistances than traditional wood plastic composites because of the applications of strong Kraft fibers as reinforcement and thermosetting UPE as matrix. Molding pressure had various effects on the many properties of composites. With molding pressure increased from 6MPa to 25MPa, the mechanical properties and creep resistances increased gradually until about 20MPa and then decreased, which were attributed to the different interface adhesions between UPE resin and Kraft fibers at various molding pressures as evidenced by DMA analysis. Benefited from the use of low-viscosity UPE resin, the resin content of Kraft fiber reinforced UPE composites could reduce to 28.3% while strength and creep resistance were still much better than that of the thermoplastic wood-plastic composite (WPC) with 40% polymer matrix.

scholarly journals Micromechanical Modeling of Flexural Strength for Epoxy Polymer Concrete

2017 ◽  
Vol 09 (08) ◽  
pp. 1750117 ◽  
Author(s):  
Dongpeng Ma ◽  
Yiping Liu ◽  
Nanli Zhang ◽  
Zhenyu Jiang ◽  
Liqun Tang ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Epoxy Resin ◽  
Epoxy Polymer ◽  
Resin Content ◽  
Micromechanical Modeling ◽  
Polymer Concrete ◽  
Flexural Performance ◽  
Micromechanics Models ◽  
Strong Adhesion ◽  
Good Agreement

Epoxy polymer concrete (EPC) has been widely used in civil engineering nowadays due to its excellent mechanical properties and advantages in processing. In this paper, a modeling study has been carried out on the flexural performance of EPC. Two classic micromechanics models, i.e. rule of mixture and Mori-Tanaka method, are introduced to predict the flexural strength of EPC with various epoxy resin contents. The comparison shows that the parallel model based on the rule of mixture attains a good agreement with the measured results when the epoxy resin content is sufficiently high to achieve strong adhesion between the aggregate and the epoxy resin. In contrast, the Mori–Tanaka method with the failure criterion dominated by the weakest phase fails to give acceptable prediction due to the unsuitability of its basic assumptions to EPC, particularly when the epoxy resin content is at relatively high levels.

scholarly journals Some advantages of three-layer medium-density fibreboard as compared to the traditional single-layer one

2019 ◽  
Vol 65 (1) ◽  
Author(s):  
Turgay Akbulut ◽  
Nadir Ayrilmis
Keyword(s):  
Bond Strength ◽  
Internal Bond ◽  
Single Layer ◽  
Middle Layer ◽  
Resin Content ◽  
Internal Bond Strength ◽  
Medium Density ◽  
Medium Density Fibreboard ◽  
Uf Resin ◽  
Layer Medium

Abstract The aim of the study was to develop three-layer medium-density fibreboard (MDF) manufacture by adding the coarse fibres in the middle layer, like three-layer particleboard. The liquid urea–formaldehyde (UF) resin was reduced from 10.5 to 6.5 wt% in the middle layer of the MDFs. The UF resin content was kept constant at 10 wt% in the surface layers of all the MDFs. Moreover, the average density of MDFs was decreased from 730 to 650 kg/m3. The internal bond strength of three-layer MDFs decreased with decreasing UF resin content (10.5 to 8.5 wt%) in the middle layer. However, the decreases in the internal bond strength were statistically not significant. The internal bond strength values of the MDFs having density between 730 and 675 kg/m3 did not show significant differences. The cost savings of the resin were 20% when the amount of resin was reduced from 10.5 to 8.5 wt%. Three-layer MDFs had lower resin consumption at lower densities over traditional single-layer MDFs produced in the same plant with the same material components without decreasing their technological properties. In conclusion, it can be said that three-layer MDF could be produced at a lower cost than traditional single-layer MDF.

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