index
text
article
2016
per
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
1
1
http://basparesh.ippi.ac.ir/article_1386_0d92d17212e3c5b6ff8a22e80062986a.pdf
Investigation of Properties and Applications of Acrylic Pressure Sensitive Adhesives in Transdermal Drug Delivery Systems
mojtaba
taghizadeh
عضو هیئت علمی پژوهشگاه پلیمر
author
mojgan
mirzataheri
عضو هیئت علمی پژوهشگاه پلیمر
author
hosein
abedi moghadam
فارغ التحصیل پژوهشگاه پلیمر
author
text
article
2016
per
Acrylic pressure sensitive adhesives are an important class of adhesives which have attracted more attention than other adhesives because of their transparency, oxidation resistance, non-toxicity and relatively low cost. One of the most promising applications of these adhesives is in transdermal drug delivery systems in which drugs are released from adhesive in a controllable manner and enter the body through the skin. In this paper, first, the composition of the pressure sensitive adhesives and their properties are discussed and next the applications of these adhesives in transdermal drug delivery systems and the effect of their composition on drug release are reviewed in concisely. The results represented here indicate that the structure and content of acrylic monomers, secondary comonomers and functional group-containing monomers in the composition of pressure sensitive adhesive have significant effects on the adhesion properties of these adhesives. Investigations also show that acrylic pressure sensitive adhesives can be used effectively in transdermal drug delivery systems. The matrix of acrylic adhesive has high solubility for many drugs and can be used for loading of different drugs. Drug release of these systems is strongly affected by the composition of acrylic adhesive; and drug permeation can be adjusted by varying the type of acrylic adhesive. The presence of comonomers in the structure of acrylic adhesive, besides changing the physical and adhesion properties, significantly affects permeation and drug release from the adhesive. The permeation of drug is lowered by increasing polarity and hydrophilicity of the adhesive.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
3
14
http://basparesh.ippi.ac.ir/article_1249_ef28038cf6c74c2a6d19bcb35fc31c6e.pdf
dx.doi.org/10.22063/basparesh.2016.1249
Removal of Oil Pollutants from Water by Modified Natural Polymers Fibers
Hassan
Fattahi
دانشگاه صنعتی مالک اشتر
author
Mohammad
Koselou
دانشگاه صنعتی مالک اشتر
author
Yones
Mosaei Oskoei
دانشگاه صنعتی مالک اشتر
author
text
article
2016
per
Due to increasing consumptions in fossil fuels and their transportation through pipelines in the sea, water pollution by petroleum products has become a global problem. Various methods are used to remove oil pollutants from sea waters. Among them different absorbents based on synthetic and natural polymers are common. Because of their high costs and lack of degradability, less attention is paid on synthetic polymers. In contrast, due to their surface roughness, high capillarity, suitable functional groups, low cost, biodegradability, and non-toxicity, natural polymers have gained more attention in this application. In this review, natural polymers suitable for removal of oil spills are considered in two categories including polymers derived from plant or animal sources, and the removal of oil pollutants by each category of polymers is discussed. The structure-property relationship of natural polymers associated with their ability for removing oil pollutants and their surface modifications for improving oil sorption capacity are reviewed.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
15
28
http://basparesh.ippi.ac.ir/article_1281_9ffa5743b69cd885ac872ca66023cf2f.pdf
dx.doi.org/10.22063/basparesh.2016.1281
Functional Polyolefins: From Synthesis to Application
ahad
hanifpour
دانشجو-پژوهشگاه پلیمر و پتروشیمی ایران
author
naeimeh
bahri-laleh
عضو هیئت علمی پژوهشگاه پلیمر و پتروشیمی ایران
author
mehdi
nekoomanesh
عضو هیئت علمی پژوهشگاه پلیمر و پتروشیمی ایران
author
majid
karimi
عضو هیئت علمی پژوهشگاه پلیمر و پتروشیمی ایران
author
text
article
2016
per
Making polymer alloys, copolymerization, functionalization, preparing polymeric composites using inorganic components or adding additives such as plasticizers and stabilizers to polymers are new strategies to modify polymers suitable in new applications. Among these methods, functionalization of polyolefins counts as a useful strategy for synthesis of new materials with improved properties. Functional groups change the important properties of polyolefins such as adhesion, penetration, compatibility, resistance to solvents, rheological and surface properties like colorability and printability, therefore, the functionalization can extend their application to other fields including adhesives, colors and insulators.To obtain a polymer with some particular properties, besides the type of functional groups, it is necessary to control their contents. Therefore, development of methods for controlled synthesis of functionalized polyolefins by conventional industrial monomers has achieved great interest in academic and industrial research. In this paper, several different methods for synthesis of functional polyolefins, their properties and applications are discussed in brief.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
29
42
http://basparesh.ippi.ac.ir/article_1265_b448c37c0e9769965be45a481c41d788.pdf
dx.doi.org/10.22063/basparesh.2016.1265
A Brief Review on Fabrication of Three-dimensional Porous Scaffolds by Electrospinning-Part I: Physical Methods
zahra
pedramrad
دانشجوی دکتری-دانشگاه گیلان
author
Javad
Mokhtari
مدیر گروه مهندسی نساجی دانشگاه گیلان
author
text
article
2016
per
Nanofiber scaffolds possess high surface-to-volume ratios and adjustable porosity which promotes cellular activities such as attachment and infiltration, therefore providing some key characteristics of the native extracellular matrix. Compared to other production methods of nanofibers, electrospinning is a versatile and simple procedure. Due to recent developments and improvements, electrospinning is becoming a popular technique in the fabrication of three-dimensional (3D) scaffolds. In general, 3D scaffolds can provide a better link between single cells and organs than conventional 2D scaffolds. To date, several approaches have been proposed to fabricate 3D fiber structures by electrospinning. This article summarizes the production of 3D scaffolds using electrospinning techniques by physical methods including combining rapid prototyping and direct-write with electrospinning, post-processing after electrospinning (laser process, physical punching method), liquid-assisted collection, template-assisted collection, porogen-added electrospinning, co-axial electrospinning, and needleless electrospinning. Furthermore, the role of various factors like voltage and humidity in electrospun scaffolds is discussed.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
43
56
http://basparesh.ippi.ac.ir/article_1280_7f7eb7f1344a3593396a43df822e3394.pdf
dx.doi.org/10.22063/basparesh.2016.1280
Smart Polymers: VI. Application of Photochromic Polymers in Stimuli-Responsive Systems
jaber
Keyvanrad
دانشجوی کارشناسی ارشد پلیمر پژوهشگاه پلیمر و پتروشیمی ایران
author
amin
abdollahi
فارغ التحصیل پژوهشگاه پلیمر
author
ali reza
mahdavian
هیات علمی پژهشگاه پلیمر و پتروشیمی ایران
author
text
article
2016
per
Reversible photochromic polymers are amongst the stimuli-responsive systems and have particular optical properties, which change reversibly between two isomers by "on" and "off" induction of stimuli such as UV/Vis irradiation. Reversible changes in physical and chemical properties and electronic structure (absorption and emission spectra) of these polymers can be observed by their fast response to irradiation. Moreover, other changes in properties of the polymer matrix are not expected during this phenomenon.To achieve light-sensitive polymers, the photochromic materials can be introduced in the polymer matrix through copolymerization or doping process. Chemical bonding between the polymer matrix and photochromic dye can lead to higher optical properties, life-time, photostability and chemical resistance of photochromic compound. Recently, stimuli-responsive polymers have received much attention because of their exceptional smart behavior and potential applications such as dual-color polymeric nanoparticles, reversible optical data storage, security documents and anti-counterfeiting, chemical sensors and ophthalmic lens.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
57
69
http://basparesh.ippi.ac.ir/article_1261_70c93ecb14d0f08043b221f75b6e42ea.pdf
dx.doi.org/10.22063/basparesh.2016.1261
Multifunctional Composites as Filling Materials in Dentistry
atousa
samaniyan
دانشگاه آزاد واحد یزد
author
محمد
میرجلیلی
عضو هیئت علمی
author
text
article
2016
per
With advances made by material science and improvements in properties of polymers used as dental materials and increasing their applications, we have made attempts in studying polymer composites as filling materials which have been extensively used in dental applications. Indental filling procedure which is a pervasive issue in dentistry in addition to the maintaining the health and strength of the teeth, their appearance is also very important to be preserved. In this paper, multi-functional composites, their components, three different types of polymer matrix, polymerization reaction, and physical properties of these composites are investigated. The advanced polymer filler materials introduced in to the market over 50 years illustrate that they are viable alternatives to amalgam both in terms of appearance and physical and chemical properties. Monomers including conventional methacrylates, methacrylates with low shrinkage and silver, and their fillers and coupling agents are discussed.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
70
81
http://basparesh.ippi.ac.ir/article_1267_32cc43befed384c258fd49e4481a7fc2.pdf
dx.doi.org/10.22063/basparesh.2016.1267
Catalysts Based on Late Transition Metals (LTM): A Second Generation of Single Site Catalysts in Designing New Diimine Ligands for Olefin Polymerization
hasan
arabi
عضو هیئت علمی پژوهشگاه پلیمر و پتروشیمی ایران
author
NONA
Ghasemi hamedani
شرکت ملی صنایع پتروشیمی، شرکت پژوهش و فناوری پتروشیمی
author
text
article
2016
per
Ziegler-Natta and metallocene catalysts play an important role in polyolefin industrial production but their intrinsic drawbacks specially in providing new architectures in polymer chains and tolerance against polar functional groups havestimulated a major shift of focus on developing new catalytic systems especially late transitionmetal (LTM) catalysts. Pd (II)/ Ni(II)–α-diimine complexes are a major group of LTM catalysts. In these systems, any changes in ligand structure or even polymerization parameters dramatically affect the catalyst performance and final properties of polymer. An exciting recent direction in the polyolefin field is the design of new ligands in order to improve the performance of LTM catalysts in the polymerization systems. Herein, the trends inresearch activities followed by pioneer companies in the field of second generation of single site catalysts and also the specifications of LTM catalysts based on diimine systems and the new designed ligands of this family have been reported.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
82
94
http://basparesh.ippi.ac.ir/article_1313_16849fffe2fbbc76fb34145204841f44.pdf
dx.doi.org/10.22063/basparesh.2016.1313
Polyurethane Foam Coating Degradation: Mechanisms and Methods of Assessment and Prevention of Degradation
sahar
abdollahi baghban
دانشگاه صنعتی امیرکبیر-دانشجو
author
manouchehr
khorasani
دانشگاه صنعتی امیرکبیر-عضو هیئت علمی دانشکده پلیمر و رنگ
author
text
article
2016
per
Polyurethane foam (PUF) is one of the polymers which in recent years has been most frequently used in many different industries. Polyurethane foam coatings used as thermal and sound insulation materials can also be employed as top coats in order to decorate or protect public premises such as hospitals, cinema halls and etc. The benefits of PUF coatings include light-weight building construction, very good thermal and sound insulation, excellent adhesion to diverse substrates, excellent mechanical properties, high tensile strength, resistance to elongation, resistance to impact, abrasion and cracking, direct applicability on the surface of different materials such as asphalt, concrete, metal, plastic and wood, the ability to re-coat the previously coated surfaces, quick, easy and complete cure at room temperature and improving the speed of construction. A few studies have been done in order to increase the service life of PUF and PUF coatings. In this review, the results of these studies on different types of PUF coating degradation mechanisms including chemical (oxidation, thermolysis, photolysis, pyrolysis, solvolysis, hydrolysis, aminolysis, glycolysis and etc.), physical, mechanical and biological mechanisms have been discussed. Also different assessment test methods of PUFs degradation included QUV chamber, prohesion chamber and triethylene phosphate effect which are reported and the obtained results are analyzed. Finally, different applicable methods such as antioxidants and light stabilizers are considered to improve PUF’s resistance against degradation.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
95
106
http://basparesh.ippi.ac.ir/article_1287_1a80f2af0ea9ea1a90963f7215105b55.pdf
dx.doi.org/10.22063/basparesh.2016.1287
Melt Electrospinning: An Overview on History, Methods and Applications
Hamed
Daemi
Ph.D. Candidate at IPPI
author
Maryam
Mashayekhi
دانش آموخته رشته مهندسی پلیمر دانشگاه صنعتی امیرکبیر
author
Mahya
Safarzade
دانش آموخته رشته مهندسی پلیمر دانشگاه صنعتی امیرکبیر
author
text
article
2016
per
Electrospinning has been developed as a common method to produce micro- and nanofibers in both laboratory and industrial areas due to its convenience, low cost and availability. In this method, continuous fibers are fabricated as a consequence of applying an external electrostatic field to a polymer solution or melt flow. Solvent-free melt electrospinning system has attracted interests in application fields such as solar cells, biotechnology, environment, and defense because it does not employ harmful toxic solvents. Melt electrospun fibers are larger in diameter than those obtained from solution electrospinning. In this regard, there are limited reports on the fabrication of nanofibers by melt electrospinning. With respect to the developments in fabrication of polymeric fibers used in different industries, in this study, a comprehensive literature review is presented on recent developments in melt electrospinning concerning instruments and its applications, and its differences with solution electrospinning.
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
107
115
http://basparesh.ippi.ac.ir/article_1251_0d81651786e779c1ada96b8c802fa16c.pdf
dx.doi.org/10.22063/basparesh.2016.1251
news
text
article
2016
per
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
116
119
http://basparesh.ippi.ac.ir/article_1387_84bedf772e58ab62617378228fde4486.pdf
prominent scientist
majid
Ghiass
عضو هیئت علمی پژوهشگاه پلیمر و پتروشیمی ایران
author
text
article
2016
per
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
120
125
http://basparesh.ippi.ac.ir/article_1388_0912bc25dfe81f8074ab779a4f993a50.pdf
Thesis
text
article
2016
per
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
126
127
http://basparesh.ippi.ac.ir/article_1389_f39adb8bca9258afaf37c6a1ba1ed8e1.pdf
Books
text
article
2016
per
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
128
128
http://basparesh.ippi.ac.ir/article_1390_e4b9c49e3010925e82c13c10040cb924.pdf
seminars
text
article
2016
per
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
129
129
http://basparesh.ippi.ac.ir/article_1391_b3dd105cf4fa3ae56ac157e538e82ece.pdf
website
text
article
2016
per
Basparesh
Iran Polymer and Petrochemical Institute
2252-0449
6
v.
2
no.
2016
130
130
http://basparesh.ippi.ac.ir/article_1392_669f93aeda51d926881713d01e9e491f.pdf