Back SearchTitle: CYLINDRICAL ORTHOTROPIC THERMAL CONDUCTIVITY OF SPIRAL WOVEN COMPOSITES. PART III: AN ESTIMATION OF THEIR THERMAL PROPERTIES
Page Range: p.167-182
Author(s): Chang-Hsuan Chiu; Chung-Li Hwan; Chao-Chuan Cheng; Tsai K H
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
This work refers to a previously proposed mathematical model by the authors, for determining the effective thermal properties of spiral woven fabric composites. In this work, a parameter estimation (PE) technique was used to evaluate the thermal propertie
Title: A KINETIC MODEL FOR THE LOW TEMPERATURE CURING OF AN UNSATURATED POLYESTER RESIN WITH SINGLE AND DUAL INITIATORS
Page Range: p.183-190
Author(s): Vafayan M; Beheshty M H; Nasiri H
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
The development of a kinetic model for the prediction of the reaction rate and gel time for dual initiator systems is described. A study was made of the influence of methyl ethyl ketone peroxide (MEKP), acetylacetone peroxide (AAP), and their mixtures, on the room temperature curing of kinetics of an unsaturated polyester resin when the cure was accelerated with cobalt naphthenate. The results were compared with theoretical predictions. For MEKP and AAP mixtures (dual initiator systems), the gel time was found to be proportional to the logarithm of the initiator ratio as predicted by the theory. 32 refs.
Title: SYNTHESIS AND APPLICATION IN POLYPROPYLENE OF A NOVEL NITROGEN-CONTAINING INTUMESCENT FLAME-RETARDANT
Page Range: p.191-198
Author(s): Gang Liu; Jianquing Zhao; Yonghua Zhang; Shumei Liu; Hua Ye
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
In this work, a nitrogen-containing blowing agent, poly(2-piperazinylene-4-morpholino-1,3,5-triazine) (PPMT) was synthesised and used as the gas resource in an intumescent flame retarded polypropylene system. In addition, nickel acetate was used as a synergistic agent to improve the flame retardancy of PP. Experimental results showed that flame retarded PP could reach a V-0 rating with 25 wt% additives, including the flame retardant. A variety of characterisation method were used, including limiting oxygen index, the UL-94 flammability test, and thermogravimetric analysis to evaluate the flame retardancy and thermal stability of flame retarded polypropylene. The synthesised PPMT was shown to exhibit an excellent intumescent effect when used together with ammonium polyphosphate and pentaerythritol as a basic blowing ingredient in an intumescent flame retardant system for PP. 15 refs.
Title: EFFECTS OF WINDING ANGLES ON THE STRENGTH OF FILAMENT WOUND COMPOSITE TUBES SUBJECTED TO DIFFERENT LOADING MODES
Page Range: p.199-206
Author(s): Hamed A F; Khalid Y A; Sapuan S M; Hamdan M M; Younis T S; Sahari B B
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
An investigation is reported into the effect of the winding angle on the deformation and strength of filament wound glass fibre reinforced pipes subjected to a variety of uniaxial and biaxial membrane stresses. Stress-strain response up to fracture for thee different winding angles under different loading modes were obtained. The test results showed the effect of the winding angle on the elastic constants and on the non-linear stress-strain behaviour, and also that the optimum winding angles depended on the loading modes applied. For loading mode I (hoop pressure loading), the angle should be 55 deg. For loading mode II (biaxial pressure loading), the angle should be 75 deg. For loading mode III (axial compressive loading), the filament wound pipe should be wound at 85 deg. 8 refs.
Title: IN-PLANE MECHANICAL PROPERTIES OF A CARBON-EPOXY COMPOSITE LAMINATE AT ELEVATED TEMPERATURES
Page Range: p.207-216
Author(s): Zhou Z Q; Liu X L; Chiu W K
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
Experiments were conducted to determine the in-plane tensile and shear properties of a carbon-epoxy plain weave composite laminate. In particular, the in-plane shear viscoelastic response of the laminate was investigated by isothermal tensile creep testin
Title: PREPARATION AND CHARACTERISATION OF POLYETHYLENE-OCTENE GRAFTED MALEIC ANHYDRIDE-TOUGHENED 70:30 PA6/PP/MMT NANOCOMPOSITES
Page Range: p.217-227
Author(s): Othman N; Hassan A; Rahmat A R; Wahit M U
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
Blending polyamide and polypropylene results in improved chemical and moisture resistance, dimensional stability and overall costs. However, since they are immiscible, polypropylene grafted with maleic anhydride was used as a compatibiliser is used. The blends, in the ratio 70:30 (PA6:PP) were melt compounded with a maleated polyethylene-octene elastomer (POEgMAH) and organophilic modified montmorillonite in a co-rotating twin-screw extruder followed by injection moulding. This paper focuses on the effect of nano-size organoclay concentration on the mechanical and thermal properties of PA6/PP blends containing 10wt% POEgMAH. A PA6 dominant blend was used because the high polarity of PA6 was needed to facilitate a reaction with the octadecylamine group of the organoclay. 43 refs.
Title: MODE 1 INTERLAMINAR FRACTURE BEHAVIOUR OF CONTINUOUS GLASS FIBRE/POLYPROPYLENE COMPOSITES BASED ON COMMINGLED YARN
Page Range: p.229-239
Author(s): Yantao Wang; Qingzhi Dong; Xin Liu
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
The Mode 1 interlaminar fracture behaviour of commingled glass fibre-reinforced polypropylene composites was characterised. The composites consisted of unidirectional , woven fabric and mat plies respectively. The effect of the cooling rate on the delamin
Title: EFFECT OF COMPATIBILISER AND FIBRE CONTENT ON JUTE REINFORCED HDPE/EPDM: A DYNAMIC MECHANICAL AND THERMAL STUDY
Page Range: p.241-247
Author(s): Sarkhel G; Banerjee A; Bhattacharya P
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
With the increased use of agro-based thermoplastic composites in applications for which dynamic data are directly relevant, there is a need to investigate the effect of fibre concentration and polymer composite structure on the dynamic mechanical thermal
Title: EFFECT OF ANHYDRIDES ON THE MECHANICAL, THERMAL AND MORPHOLOGICAL PROPERTIES OF TPS/PE BLENDS MADE BY ONE-STEP EXTRUSION
Page Range: p.249-253
Author(s): Yu Jing-lin; Pang Ji-ping; Wang Shu-jun; Yu Jiu-gao
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
Starch is a naturally hydrophilic macromolecule, whereas synthetic polymers such as polyethylene are hydrophobic. When these two incompatible polymers are blended it results in poor mechanical properties, low interfacial adhesion and poor thermal stabilit
Title: PHASE CHANGE MATERIALS-EMBEDDED COATINGS PREPARED BY IN-SITU POLYMERISATION OF WATER-BORNE POLYURETHANE-UREA
Page Range: p.255-264
Author(s): Hye-Jin Yoo; Eun Yong Kim; Han-Do Kim
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Issue Year: ppc
Volume: 15
Issue No: No.3
Abstract
Waterborne polyurethane-urea emulsions, embedded with phase change materials hexadecane, octadecane and eicosane as microspheres, were prepared by in-situ polymerisation in an emulsion system. Polyamide fabrics with coated with the formulated water borne PU with embedded phase change materials, and the optimum/maximum contents of embeddable phase change materials for stable emulsions were identified. The embedded water borne PU dispersions were found to have excellent potential as coating materials with good heating and cooling functions. 21 refs.