Jalil Morshedian
Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran
[ 1 ] - On study of X-ray absorption and properties of dispersion of W, MoS2 and B4C particles in high density polyethylene
Shielding radiation from both x-rays and gamma-rays is important for personnel in medical fields e.g. interventional radiology, nuclear power stations, and other inspection facilities where radiation is involved. Lead is known for its effective shielding property against these high energy radiations, however heaviness and toxicity are its main drawback. In this study effectiveness of non-lead p...
[ 2 ] - Influence of annealing on anisotropic crystalline structure of HDPE cast films
High density polyethylene (HDPE) films were produced using cast film extrusion process with different draw ratios, ranging from 16.9 to 148.8. Morphology, crystallinty and orientation state of crystalline and amorphous phases of the cast films were investigated using scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and polarized Fourier transform infrared spectroscopy...
[ 3 ] - The effect of high-energy electron beam on drawn and undrawn high density polyethylene fibers
HDPE monofilaments were obtained using different extruders and drawn by post-extruder equipments. After solidification, drawn and undrawn monofilaments (draw ratio 7:1) were irradiated with 10 MeV electron beams in air at room temperature at 25, 50, 75, 100 and 125 kGy dose ranges to induce a network structure. HDPE crosslinking was studied on the basis of gel content measurements. The fibers w...
[ 4 ] - بررسی خواص مکانیکی و رئولوژیکی چندسازه سه جزئی پلیپروپیلن- پلیاتیلن ترفتالات ضایعاتی- پودر چوب
در این پژوهش اثر استفاده از پلیاتیلن ترفتالات ضایعاتی بر خواص مکانیکی و رئولوژیکی چندسازه پلیپروپیلن- پودر چوب بررسی شده است. چندسازههای پلیپروپیلن-پلیاتیلن ترفتالات ضایعاتی- پودر چوب، طی فرایندی دومرحلهای تهیه و اثر مقدار پلیاتیلن ترفتالات ضایعاتی در محدوده 33-10 درصد وزنی بر روی خواص چندسازه نهایی در 5 تیمار بررسی شد. خواص مکانیکی با استفاده از آزمون کشش و مقاومت شکست بهوسیله آزمون ضر...
[ 5 ] - تهیه فیلم یا غشای متخلخل پلیاولفینی با روش کشش
غشا لایه نازکی است که اجزای سیال را بهطور گزینشی جدا کرده و انتقال جرم بین فازها را کنترل میکند. بنابراین، دو وظیفه مهم گزینشپذیری و نفوذپذیری بر عهده غشاست. غشاها براساس جنس مواد اولیه به چهار دسته پلیمری، سرامیکی، فلزی و مایع تقسیم میشوند. در بین غشاهای رایج، غشای پلیمری بهدلیل دردسترس بودن با ساختارهای شیمیایی متنوع، خواص فیزیکی بهینه و قیمت کمتر کاربردیتر است. غشاهای پلیمری با چهار رو...
[ 6 ] - Compatibilization of polycarbonate/poly (ethylene terephthalate) blends by addition of their transesterification product
In this study, poly carbonate (PC) and poly (ethylene terephthalate) (PET) were reactive melt-blended under two different conditions to produce PC/PET copolymers. For each condition, samples were taken at specified mixing times representative a specific structure of copolymers and each one employed to physically compatibilize a PC/PET blend with a fixed composition. Reactive blending and copoly...
[ 7 ] - Introducing a novel Polyvinyl chloride/Tungsten composites for shielding against gamma and X-ray radiations
Introduction: This study introduces a novel polyvinyl chloride (PVC)/tungsten composites with characterization of their shielding properties by employing different techniques. Methods: The PVC/tungsten composites were produced by employing various weight fractions of tungsten micro-particles including 0, 20, and 40 % wt via melt blending method. In the next st...
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