نتایج جستجو برای: melt flow index

تعداد نتایج: 877340  

Journal: :علوم و تکنولوژی پلیمر 0
اسماعیل قاسمی حامد عزیزی پروین احسانی نمین

the growing interest in using natural fibers as reinforcing agents of polymer-based composites is mainly due to their advantages such as lower cost, lower density, ease of preparation, lower energy requirements for processing, biodegradability, wide availability and relative non-abrasiveness over traditional reinforcing fibers such as glass and carbon. in this study, wood-plastic composite (wpc...

Journal: :iranian journal of chemistry and chemical engineering 0
zohra djetoui université ferhat abbas sétif-1, faculté de technologie, département de génie des procédés, maabouda, route de bejaïa, sétif 19000, algeria ferhat djerboua département de génie des procédés, faculté de technologie, université ferhat abbas de sétif-1 josé m. pereña instituto de ciencia y tecnología de polímeros, ictp-csic. juan de la cierva 3, 28006-madrid, spain rosario benavente instituto de ciencia y tecnología de polímeros, ictp-csic. juan de la cierva 3, 28006-madrid, spain

this study treats one important aspect of starch-filled rubber compounds which is their rheological behavior. starch-based sbr1712 masterbatches resulting from various formulations were prepared using a mini two roll mill and an internal mixer (plastograph brabender).the content in starch was varied from 0 to 50 phr. the effect of starch content on the rheological behavior was evaluated through...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1997
rouhallah bagheri faranak naimian nassrin sheikh

acrylamide was grafted in low density polyethylene during melt processing in the presence of a free radical initiator using a torque rheometer in a closed system. effects of processing time, acrylamide and benzoyl peroxide concentrations were studied. ftir studies revealed that the degree of grafting increased by an increase in acrylamide concentration. maximum grafting was obtained at 7 minute...

This study treats one important aspect of starch-filled rubber compounds which is their rheological behavior. Starch-based SBR1712 masterbatches resulting from various formulations were prepared using a mini two roll mill and an internal mixer (Plastograph Brabender).The content in starch was varied from 0 to 50 phr. The effect of starch content on the rheological behavior was ev...

Faranak Naimian Nassrin Sheikh Rouhallah Bagheri

Acrylamide was grafted in low density polyethylene during melt processing in the presence of a free radical initiator using a torque rheometer in a closed system. Effects of processing time, acrylamide and benzoyl peroxide concentrations were studied. FTIR studies revealed that the degree of grafting increased by an increase in acrylamide concentration. Maximum grafting was obtained at 7 mi...

Journal: :علوم و تکنولوژی پلیمر 0
شکوفه حکیم محمدمهدی مرتضوی لیلا مبلغ مهدی نکومنش حقیقی

full factorial experimental design (23) for the evaluation of slurry ethylene polymerization in the presence of an industrial ticl4/mgcl2 ziegler-natta catalyst was employed. the following parameters were used as independentvariables: al/ti molar ratio, reaction temperature and hydrogen partial pressure. the total polymerization pressure was 9 bar. catalyst activity, mfi (melt flow index) and m...

Journal: :علوم و تکنولوژی پلیمر 0
مهشید مشهدی حسن شیرازی رضا مرندی مهدی سلامی کلجاهی وحید حدادی اصل سید مهدی قافله باشی زرند

in this study, the slurry polymerization of ethylene over ticl4/mgcl2/alet3 was obtained. firstly, to obtain the optimum value of [al]/[ti], the effect of [al]/[ti] on polymerization rate and catalyst yield was studied. also, the effect of catalyst content on yielding, crystallization, melting point and density of product were obtained. to determine the order of reaction, the monomer pressure w...

Journal: Polyolefins Journal 2019

High impact polystyrene (HIPS)/corn starch blends were prepared in presence of glycerol as a plasticizer via melt extrusion process by a twin-screw extruder. The novelty of this work is first, because of the use of pre-gelatinized corn starch as modified one and second, the procedure of making blends by extruder which makes it ease of access and also industrially possible. The blends were then ...

2015
Paul Joseph Svetlana Tretsiakova-McNally

Polymeric materials often exhibit complex combustion behaviours encompassing several stages and involving solid phase, gas phase and interphase. A wide range of qualitative, semi-quantitative and quantitative testing techniques are currently available, both at the laboratory scale and for commercial purposes, for evaluating the decomposition and combustion behaviours of polymeric materials. The...

2016
C. H. Lee S. M. Sapuan J. H. Lee M. R. Hassan

A study of the melt volume flow rate (MVR) and the melt flow rate (MFR) of kenaf fibre (KF) reinforced Floreon (FLO) and magnesium hydroxide (MH) biocomposites under different temperatures (160-180 °C) and weight loadings (2.16, 5, 10 kg) is presented in this paper. FLO has the lowest values of MFR and MVR. The increment of the melt flow properties (MVR and MFR) has been found for KF or MH inse...

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