Impact Strength of Laminated Floor Panel from Kenaf (Hibiscus cannabinus) High Density Fibreboard

2015 ◽  
Vol 799-800 ◽  
pp. 201-204
Author(s):  
Mansur Ahmad ◽  
Nurul Nadia Mohd Khairuddin ◽  
Nurul Atiqah Mohd Ayob
Keyword(s):  
Surface Layer ◽  
Impact Strength ◽  
High Density ◽  
Hibiscus Cannabinus ◽  
Floor Panel ◽  
Kenaf Bast ◽  
The Impact

This study provides a better understanding of the effect of density and thickness on impact strength of laminated floor panel from Kenaf high density fibreboard (KHDF). The objective of this study was therefore to determine the role of density and thickness on the impact strength of laminated floor panel. Laminated floor panels consisted of high density fibreboard (HDF) as core and decorative paper as surface layer and backing. Kenaf bast fibres were used for HDF with three different densities (850, 960 and 1000 kg/m3) with thickness of 8mm and 12mm for each panel. Energy (J) value was evaluated to determine the impact strength of all various floor panels. It was found that thickness has affected statistically on impact strength while there was no significantly difference existed on density of laminated floor panel on impact strength.

Evaluation of the Aging Behavior of High Density Polyethylene in Thermal Oxidative Environment by Principal Component Analysis

2017 ◽  
Vol 727 ◽  
pp. 447-449 ◽  
Author(s):  
Jun Dai ◽  
Hua Yan ◽  
Jian Jian Yang ◽  
Jun Jun Guo
Keyword(s):  
Principal Component Analysis ◽  
Impact Strength ◽  
High Density Polyethylene ◽  
Tensile Modulus ◽  
Principal Component ◽  
Component Analysis ◽  
High Density ◽  
Aging Behavior ◽  
Data Set ◽  
The Impact

To evaluate the aging behavior of high density polyethylene (HDPE) under an artificial accelerated environment, principal component analysis (PCA) was used to establish a non-dimensional expression Z from a data set of multiple degradation parameters of HDPE. In this study, HDPE samples were exposed to the accelerated thermal oxidative environment for different time intervals up to 64 days. The results showed that the combined evaluating parameter Z was characterized by three-stage changes. The combined evaluating parameter Z increased quickly in the first 16 days of exposure and then leveled off. After 40 days, it began to increase again. Among the 10 degradation parameters, branching degree, carbonyl index and hydroxyl index are strongly associated. The tensile modulus is highly correlated with the impact strength. The tensile strength, tensile modulus and impact strength are negatively correlated with the crystallinity.

Impact Strength of High Density Solid-State Microcellular Polycarbonate Foams

2000 ◽  
Vol 123 (2) ◽  
pp. 229-233 ◽  
Author(s):  
Chris Barlow ◽  
Vipin Kumar ◽  
Brian Flinn ◽  
Rajendra K. Bordia ◽  
John Weller
Keyword(s):  
Solid State ◽  
Impact Strength ◽  
Cell Size ◽  
High Density ◽  
Gas Content ◽  
Impact Behavior ◽  
Strong Function ◽  
Impact Tests ◽  
Izod Impact ◽  
The Impact

The effect of density (relative densities 0.33 to 0.90) on the impact behavior of microcellular polycarbonate (PC) was investigated. Cell size and foaming gas content were also considered. Flexed-beam Izod impact tests were conducted and the impact strength of these foams appears to be a strong function of both density and cell size. The impact strength was observed to improve over the unprocessed polycarbonate’s impact strength for foams with relative densities of 60 percent and above. In terms of cell size, the impact strength increased with increasing cell size at a given density.

The Moderating Influence of Property Legislation on Planning Policy and Urban Form

Urban Studies ◽  
2012 ◽  
Vol 49 (16) ◽  
pp. 3479-3494 ◽  
Author(s):  
Amanda Davies ◽  
Mark Atkinson
Keyword(s):  
Urban Form ◽  
Urban Policy ◽  
Land Use Policy ◽  
Urban Land Use ◽  
High Density ◽  
Capital City ◽  
Planning Policy ◽  
The Impact ◽  
Density Development

This paper investigates the role that property titling legislation has had on the form of high-density residential development. A conceptual framework is developed for theorising the role of property legislation in moderating the impact of urban land use policy. It is argued that the impact of legislation on urban form is much more significant and direct than is often implied or suggested in reviews of planning policy. It is argued that property legislation has a greater role than simply supporting the implementation of urban planning policy. Property legislation has a moderating influence on policy and provides a barrier to the implementation of urban policy. To support this argument, the paper considers the development and implications of Western Australia’s strata titling legislation for the form of high-density development in that state’s capital city.

scholarly journals Effects of gamma radiation on the impact strength of polypropylene (PP)/high density polyethylene (HDPE) blends

2019 ◽  
Vol 12 ◽  
pp. 2169-2174 ◽  
Author(s):  
Wenzhao Wang ◽  
Xiaochao Zhang ◽  
Zongyuan Mao ◽  
Weiquan Zhao
Keyword(s):  
Impact Strength ◽  
Gamma Radiation ◽  
High Density Polyethylene ◽  
High Density ◽  
The Impact

Role of Zirconia Filler on Mechanical Properties of HDPE/UHMWPE Blend Composites

2019 ◽  
Vol 895 ◽  
pp. 272-277
Author(s):  
Bheemappa Suresha ◽  
Achyutananta Padaki ◽  
Akash Jain ◽  
Bharath Kumar ◽  
Akshay A. Kulkarni
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Bending Strength ◽  
Materials Science ◽  
Hybrid Composites ◽  
Physical And Mechanical Properties ◽  
High Density ◽  
Melt Mixing ◽  
Fractographic Features

Hybrid composites based on high-density polyethylene-grafted maleic anhydride /ultra-high density HYPERLINK "https://www.sciencedirect.com/topics/materials-science/polypropylene" \o "Learn more about Polypropylene" polyethylene (HDPE/UHMWPE) loaded with short glass fiber (SGF) and zirconia (ZrO2) micron sized particles were fabricated by melt-mixing process and their physical and mechanical properties were determined. Physio-mechanical properties such as density, hardness, flexural properties and impact strength of these composites were studied. The presence of SGF and ZrO2 in the grafted HDPE/UHMWPE blend increased the hardness, bending strength and modulus. However, impact strength decreased with increase in ZrO2 loading. Further, it was found that the HDPE/UHMWPE blend with 25 wt. % SGF and 2.5 wt. %ZrO2 showed optimum mechanical properties due to improved fiber/matrix adhesion. Scanning electron microscope was used to identify the fractographic features of the selected fractured coupons.

scholarly journals Impact of Storm-Enhanced Density (SED) on Ion Upflow Fluxes During Geomagnetic Storm

2021 ◽  
Vol 8 ◽  
Author(s):  
Shasha Zou ◽  
Jiaen Ren ◽  
Zihan Wang ◽  
Hu Sun ◽  
Yang Chen
Keyword(s):  
Geomagnetic Storm ◽  
Critical Role ◽  
Auroral Zone ◽  
High Density ◽  
Soft Particle ◽  
Event Analysis ◽  
Polar Cap ◽  
Holistic Understanding ◽  
The Impact

The impact of the dynamic evolution of the Storm-Enhanced Density (SED) on the upward ion fluxes during the March 06, 2016 geomagnetic storm is studied using comprehensive multi-scale datasets. This storm was powered by a Corotating Interaction Region (CIR), and the minimum Sym-H reached ∼−110 nT. During the ionospheric positive storm phase, the SED formed and the associated plume and polar cap patches occasionally drifted anti-sunward across the polar cap. When these high-density structures encountered positive vertical flows, large ion upward fluxes were produced, with the largest upward flux reaching 3 × 1014 m−2s−1. These upflows were either the type-1 ion upflow associated with fast flow channels, such as the subauroral polarization stream (SAPS) channel, or the type-2 ion upflow due to soft particle precipitations in the cusp region. The total SED-associated upflow flux in the dayside cusp can be comparable to the total upflow flux in the nightside auroral zone despite the much smaller cusp area compared with the auroral zone. During the ionospheric negative storm phase, the ionospheric densities within the SED and plume decreased significantly and thus led to largely reduced upward fluxes. This event analysis demonstrates the critical role of the ionospheric high-density structures in creating large ion upward fluxes. It also suggests that the dynamic processes in the coupled ionosphere-thermosphere system and the resulting state of the ionospheric storm are crucial for understanding the temporal and spatial variations of ion upflow fluxes and thus should be incorporated into coupled geospace models for improving our holistic understanding of the role of ionospheric plasma in the geospace system.

Development of Eco-Friendly Flame-Retarded High Density Polyethylene Composites

2020 ◽  
Vol 847 ◽  
pp. 55-60
Author(s):  
Yeng Fong Shih ◽  
Wan Ling Tsai ◽  
Venkata Krishna Kotharangannagari
Keyword(s):  
Impact Strength ◽  
Flame Retardant ◽  
Coupling Agent ◽  
High Density Polyethylene ◽  
Silane Coupling Agent ◽  
High Density ◽  
Silane Coupling ◽  
Surface Modified ◽  
The Impact ◽  
Modified Diatomite

The use of ammonium polyphosphate (APP) and expanded graphite (EG) as a flame retardant for polymer generally requires a relatively high amount of addition to achieve a flame-retardant effect, and is liable to cause a decrease in strength of the material. Therefore, in this study waste diatomite was used as an eco-friendly flame-retardant for high density polyethylene (HDPE) to reduce the amount of APP and EG and can reach the flame-retardant level. Moreover, the waste diatomite was heat treatment and surface modified by silane coupling agent to improve its compatibility with HDPE. The results show that the tensile strength of the HDPE drops sharply after the addition of the APP and EG. However, replace some of the APP and EG by the modified diatomite can slow down the decline and maintain the basic physical properties of the material. The impact strength of HDPE was also decreased by the addition of APP, EG and untreated diatomite. However, the impact strength of HDPE was increased after adding the surface modified diatomite. It can be seen from the experimental results that the addition of the waste diatomite modified by the silane coupling agent can reduce the usage of the flame retardant such as APP and EG, and increase the strength by increasing the compatibility between the plastic and the inorganic material. Moreover, this eco-friendly formulation can reach the UL-94 HB level, and it can be applied to interior decoration or as building materials in the future. Thus, it can not only recycle the wastes, but also reduce the threat caused by fire.

Research into High Performance Zeolite/Monomer Casting Nylon 6 (MCPA6) Composites

2013 ◽  
Vol 442 ◽  
pp. 134-137
Author(s):  
Bo Fen Huang ◽  
Han Xuan Liang ◽  
Zhi Yuan Li ◽  
Yan Chao Bai
Keyword(s):  
Thermal Decomposition ◽  
Impact Strength ◽  
High Performance ◽  
In Situ Polymerization ◽  
Nylon 6 ◽  
Experimental Results ◽  
The Impact

Zeolite / MC nylon 6 composites were prepared , followed by morphology and properties characterization of composites. The results demonstrated that a large number of pearlitic structures appeared at the interphase between the organic phases and the inorganic phases, indicating that caprolactam had happened anionic in-situ polymerization within the zeolite. The zeolite played a role of molecular rivet in zeolite / MCPA6 composites. The experimental results also showed that the composites performances were largely improved compared with pure MCPA6. When zeolite was 1 Phr, the impact strength of the composite was increased by 58%, temperature of thermal decomposition was rised by 92.9 °C. When zeolite reached 5 Phr, the composite shrinkage rate was reduced by 33%.

Effect of Compatibilizers on Mechanical and Thermal Properties of High Density Polyethylene Filled with Bio-Filler from Eggshell

2013 ◽  
Vol 699 ◽  
pp. 57-62
Author(s):  
Wanikorn Buakaew ◽  
Ruksakulpiwat Yupaporn ◽  
Nitinat Suppakarn ◽  
Wimonlak Sutapun
Keyword(s):  
Thermal Properties ◽  
Maleic Anhydride ◽  
Impact Strength ◽  
High Density Polyethylene ◽  
Average Particle Size ◽  
High Density ◽  
Degree Of Crystallinity ◽  
Average Particle ◽  
Mechanical And Thermal Properties ◽  
The Impact

In this research work, the effect of compatibilizers on mechanical and thermal properties of ESP/HDPE composites was investigated. High density polyethylene grafted with maleic anhydride (HDPE-g-MA) and ethylene propylene rubber grafted with maleic anhydride (EPR-g-MA) were used to compatibilize the ESP/HDPE composites. The ESP/HDPE composite with and without the compatibilizes was prepared at 20 wt.% ESP. The volume average particle size of ESP was 20.35 µm. The compatibilized HDPE composites were prepared at 2, 5, 8 and 10 wt.% of HDPE-g-MA and at 2, 5, 8 and 10 wt.% of EPR-g-MA, as well. It was found that ultimate stress, yield strength, and elongation at break of the ESP/HDPE composites prepared with HDPE-g-MA increased with increasing HDPE-g-MA content. In addition, Young’s modulus was maximum at 8 wt.% HDPE-g-MA. The composites filled with HDPE-g-MA had improved impact strength with increasing HDPE-g-MA content. On the other hand, the composites with EPR-g-MA showed a decrease in tensile properties and impact strength when increasing EPR-g-MA content. The impact strength of the HDPE composites compatibilized with EPR-g-MA decreased with increasing EPR-g-MA content. In addition, degree of crystallinity of the composites with EPR-g-MA was higher than that of the composite with HDPE-g-MA. Furthermore, compatibilizing ESP/HDPE composites with either HDPE-g-MA or EPR-g-MA did not influence HDPE and ESP decomposition temperatures, HDPE melting temperature and HDPE crystallization temperature.

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