Juniper Publishers Journal of Polymer science

   JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Studies of the elution dynamics of adsorption have revealed a close correspondence between the analytical solutions to (i) a direct problem formulated using an equilibrium adsorption layer model and (ii) an inverse problem formulated using the method of moments. Keywords:  Elution Dynamics; Adsorption; Charcoal; chromatograph; Numerical Equations Introduction The effects of adsorption dynamics on the elution peak profile for an arbitrary adsorption isotherm were previously analyzed in [1] using numerical simulations based on a model that assumed a layer of equilibrium adsorption (LEA model) [2]. Assuming linear adsorption dynamics, [1] revealed that the elution curves simulated using the LEA model agreed well with experimental data obtained for a given integer unit of relative adsorbent bed length (n). The solution parameters to the inverse problem, formulated using the method of moments for intege...

   JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Oral route is the most convenient and widely used method of drug administration, representing about 90% of all therapies used. It displays great advantages, such as being non-invasive, easy to administer (with the consequent high patient compliance) and cost-effective. However, serious drawbacks to conventional oral dosage forms are imposed by the gastrointestinal tract. Large fluctuations in drug bioavailability are found due to the influence of physiological factors such as variations in pH, high enzymatic activity and gastric emptying. This is the reason why frequent drug administrations are required to maintain the therapeutic plasma level of the drug. Gastroretentive Drug Delivery Systems (GRDDS) have emerged as an ideal approach to overcome these drawbacks. They are designed to prolong the gastric residence time (GRT) of the dosage forms in the stomach so that the time between dose administration ...

       JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Semi-aromatic copolyamides owing to both possessing the machinability of aliphatic polyamides and the high temperature resistance of aromatic polyamides, were widely used in automotive and electronic fields. To better summarizes the research on the structure-property relationship of semi-aromatic copolyamides, the review was carried out from three aspects: synthesis, structure characterization and structure-property relationship. The study of structure-property relationship can be applied to the modification process of semi-aromatic copolyamides, and it can shed light on the design and actual production process. Keywords:  Copolyamides; Solution Polycondensation; Sequence structure; Structure-Property Relationship Introduction Semi-aromatic copolyamides contain both aliphatic and aromatic segments, therefore possess some unique properties, such as high mechanical strength, high temper...

     JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Acrylamide is a monomer which is associated with asparagine especially when proteins react to carbohydrate during Maillard reaction. The issue of this carcinogen was highlighted by Swedish Nation Food Administration SNFA and the cause progressed by European food industries, especially spiked the high treatment to high saccharon foods. Experiments replicated to find end products of trio effects of high saccharides, free protein subunits the aminoacids and high temperature, revealing formation of acrylamide in research institutes and snack food industries. Mini review highlights formation, consumption, and health impacts of acrylamide. Keywords:  Acrylamide; Carcinogen; Processed Foods; Sugars; Maillard Reaction Abbreviations:  Swedish Nation Food Administration (SNFA); Food Standards Agency (FSA); Scientific Committee on Food (SCF) Introduction Acrylamide is a cancer causing precurser an...

   JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract In this study, using acrylamide (AAm) as monomer, potassium persulfate (K2S2O8) as initiator, N, N, N’, N’-tetramethylethylenediamine as accelerator, and N, N’-methylenebisacrylamide as crosslinking agents, titanium dioxide (TiO 2 ) as inorganic enforcement fillers, the PAAm/TiO 2  organic-inorganic composite hydrogels with enhanced mechanical properties were prepared by free radical polymerization. The obtained hydrogels were characterized by Fourier transform infrared spectroscopy (FT-IR), mechanical and swelling property tests. The experimental results show that PAAm/TiO 2  organic-inorganic composite hydrogels were successfully synthesized, the mechanical property of the hydrogel was improved but the swelling ratio of the hydrogel was decreased due to the addition of TiO 2 . Keywords:  Acrylamide; Titanium Dioxide; Mechanical Property; Swelling; Composite Hydrogel Introduction Hydroge...