Effects of molding conditions on basic properties of rice husks-waste expanded polystyrene composites by hot press molding method

Thermally conductive and electrically insulating polyamide 6 (PA6) matrix quaternary composites were prepared by hot press molding and injection molding, respectively. The quaternary composites were composed of zero-dimensional aluminum oxide particle, one-dimensional silicon carbide whisker, two-dimensional flake graphite, and PA6 resin matrix. Morphology, structure, density, thermal conductivity, volume electrical resistivity, and tensile strength of two types of composites were characterized by scanning electron microscopy, X-ray diffractometer, thermal conductivity tester, high resistance micro-current tester, and tensile tester. The results showed that crystallinity, thermal conductivity, density, and tensile strength of hot press molding samples were superior to those of samples made by injection molding method. This is due to that hot press molding method can provide higher molding pressure and longer annealing time than injection molding. The mechanism could be explained that the performances of the composites were promoted by increasing molding pressure and annealing time.

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Carbon Fiber Reinforced Thermoplastics Molding by Using Direct Resistance Heating to Carbon Nanofilaments Grafted Carbon Fiber

Journal of Composites Science ◽

10.3390/jcs3010014 ◽

2019 ◽

Vol 3 (1) ◽

pp. 14 ◽

Cited By ~ 2

Author(s):

Kazuto Tanaka ◽

Ririko Habe ◽

Masayoshi Tanaka ◽

Tsutao Katayama

Keyword(s):

Carbon Fiber ◽

Void Content ◽

Resistance Heating ◽

Fiber Reinforced ◽

Hot Press ◽

Molding Method ◽

Reinforced Thermoplastics ◽

Reinforcing Fiber ◽

Fiber Reinforced Thermoplastics ◽

Press Molding

In the automobile industry, carbon fiber reinforced thermoplastics (CFRTP) have attracted attention as potential materials to reduce the weight of the automobile body. In order to apply CFRTP to mass-produced automobile parts, it is necessary to develop the reduction of molding time and the impregnation method into the carbon fiber (CF) for the thermoplastic resin, which has relatively high viscosity. Although the conventional hot press molding uses only the heat transfer from the mold to the molding materials, it is expected to develop a new molding method for CFRTP using heat generation of the materials themselves to overcome these issues. As a method of heating the carbon fiber, there is a direct resistance heating method, in which carbon fiber is directly energized and heated by Joule heat. We have developed resistance welding methods in which carbon nanotube (CNT) grafted carbon fiber (CNT-CF) is used for the heating elements, and revealed that the higher welded strength is obtained by using CNT-CF instead of CF. Therefore, the carbon nanofilaments (CNF) grafted carbon fiber (CNF-CF) including CNF-CF is expected not only to be used as a resistance heating medium at the time of joining but also as a reinforcing fiber and as a self-heating member at the time of molding. In this study, we develop the CFRTP molding method by using direct resistance heating to CNF-CF in the hot press molding. CFRTP ([0°]20) with the volume fractions (Vf) of 40% are molded by conventional hot press and hot press with direct resistance heating to reinforcing fiber. CF or CNF-CF is used for reinforcement. CFRTP molded by hot press with direct resistance heating to CNF-CF indicated lower void content than CFRTP molded by hot press with direct resistance heating to CF. Compared to CFRTP molding by only hot press, hot press molding with direct resistance heating to CNF-CF can mold CFRTP with low void content.

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Preparation of Solution Impregnated Continuous Carbon Fibre Reinforced Poly (Phthalazinone Ether Sulfone Ketone) Composites

Advanced Composites Letters ◽

10.1177/096369350901800101 ◽

2009 ◽

Vol 18 (1) ◽

pp. 096369350901800 ◽

Cited By ~ 1

Author(s):

Liang Zheng ◽

Gong Xiong Liao ◽

Xi Gao Jian

Keyword(s):

Mechanical Properties ◽

Carbon Fibre ◽

Polymer Solution ◽

Volume Fraction ◽

Fibre Volume Fraction ◽

Fibre Volume ◽

Hot Press ◽

Molding Method ◽

Press Molding ◽

Properties Of Composites

Continuous carbon fibre reinforced Poly (phthalazinone ether sulfone ketone) (PPESK) composites were prepared using a solution impregnation process and hot-press molding method. The effects of polymer solution viscosities on fibre impregnation, fibre volume fraction and thereby on mechanical properties of composites were studied. The results show that the fibre impregnation and fibre volume fraction decreased with increasing polymer solution viscosities, and the mechanical properties of composites mainly depended on the fibre volume content.

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Development of Biodegradable Wood Fiber Foam Packaging Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.204-210.58 ◽

2011 ◽

Vol 204-210 ◽

pp. 58-61 ◽

Cited By ~ 1

Author(s):

Chen Li ◽

Sheng Ling Xiao ◽

Hong Lin

Keyword(s):

Raw Materials ◽

Potato Starch ◽

Wood Fiber ◽

Packaging Material ◽

Expanded Polystyrene ◽

Machining Process ◽

Hot Press ◽

Foaming Agent ◽

Materials Analysis ◽

Press Molding

. In daily life, expanded polystyrene foams (EPS) are widely used as packaging material and waste EPS has caused lots of environmental pollutions because it cannot be decomposed in nature. In this study, the machining process is developed of a reinforced foam packaging material by hot press molding, potato starch and birch fiber as the main raw materials. Analysis of the dosage of the birch fiber, starch adhesive and foaming agent and how do they affect the mechanical properties. Experiments show that material compressive strength is good and foam well-distributed, when the birch fiber content is 20%-25%, adhesive content is 30%-35%, and birch fiber amount is 10%-15%, the material has fine performance, and the cells are well distribute.

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Friction and Wear of Potassium Titanate Whisker Filled Carbon Fabric/Phenolic Polymer Composites

Journal of Tribology ◽

10.1115/1.4028911 ◽

2015 ◽

Vol 137 (1) ◽

Cited By ~ 7

Author(s):

Xinrui Zhang ◽

Xianqiang Pei ◽

Qihua Wang ◽

Tingmei Wang

Keyword(s):

Wear Rate ◽

Friction And Wear ◽

Dip Coating ◽

Hot Press ◽

Carbon Fabric ◽

Potassium Titanate ◽

Transfer Films ◽

Fabric Composites ◽

Phenolic Polymer ◽

Press Molding

Carbon fabric/phenolic composites modified with potassium titanate whisker (PTW) were prepared by a dip-coating and hot-press molding technique, and the tribological properties of the resulting composites were investigated systematically using a ring-on-block arrangement under different sliding conditions. Experimental results showed that the optimal PTW significantly decreased the wear-rate. The worn surfaces of the composites and the transfer film formed on the counterpart steel ring were examined by scanning electron microscopy (SEM) to reveal the wear mechanisms. The transfer films formed on the counterpart surfaces made contributions to the improvement of the tribological behavior of the carbon fabric composites. The friction and wear of the filled carbon fabric composites was significantly dependent on the sliding conditions. It is observed that the wear-rate increased with increasing applied load and sliding speeds.

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Tribological properties of PAANa/UHMWPE composite materials in seawater lubrication

Journal of Polymer Engineering ◽

10.1515/polyeng-2019-0149 ◽

2019 ◽

Vol 39 (10) ◽

pp. 874-882 ◽

Cited By ~ 1

Author(s):

Tian Yang ◽

Yongliang Jin ◽

Haitao Duan ◽

Jiesong Tu ◽

Dan Jia ◽

...

Keyword(s):

Tribological Properties ◽

High Performance ◽

Friction And Wear ◽

Surface Hardness ◽

Hot Press ◽

Uhmwpe Composites ◽

Resistant Composite Material ◽

Ultra High Molecular Weight ◽

Press Molding ◽

Uhmwpe Composite

Abstract To prepare a high-performance anti-friction and wear-resistant composite material for friction sub-components in marine equipment, a modification was made by adding different amounts sodium polyacrylate (PAANa) to ultra-high molecular weight polyethylene (UHMWPE). PAANa/UHMWPE-blended powders were prepared at individual weight ratios of 0/100, 3/97, 5/95, 8/92, 13/87, and 18/82 with hot-press molding. In seawater, experiments of PAANa/UHMWPE composites sliding against GCr15 have been conducted with a ball-on-disk configuration in this study. The results show the surface hardness of composites was almost the same with the increase in PAANa proportion, however, the friction coefficient and wear scars of PAANa/UHMWPE composites/GCr15 sliding pairs firstly decrease and then increase. Scanning electron microscopy (SEM) results show that wear mechanism of the composites is mainly plastic deformation and spalling. The composites with PAANa content of 3% and 5% achieves better tribological properties than the pure UHMWPE material.

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