Juniper Publishers Journal of Polymer science

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                                        JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Novel phenyl-disubstituted propyl 3-(R-phenyl)-2-cyanoacrylates, RPhCH=C(CN)CO 2 C 3 H 7 (where R is 2-fluoro-5-methyl, 3-iodo-4-methoxy, 5-iodo-2-methoxy, 3,5-dichloro, 3,4-difluoro, 3,5-difluoro, 2-chloro-4-fluoro, 2-chloro-6-fluoro, 3-chloro-2-fluoro, and 3-chloro-4-fluoro) were prepared using condensation of substituted benzoic aldehydes and propyl ester of cyanoacetic acid. The ethynyl benzene copolymerization of novel cyanoacrylates was conducted in solution with radical initiation at 70 C. Nitrogen analysis, 1 H & 13 C NMR was used to analyze composition and the structure. Thermal behavior of the copolymers was analyzed by DSC and TGA. Keywords: Radical copolymerization; Styrene copolymers; Trisubstituted ethylene’s; Cyanoacrylates ...

                                                                               JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract This review is devoted to recent progress in the design of anticancer drug delivery systems with participation of unique polysaccharide gellan gum. At first a brief literature survey on conformational and phase behavior of gellan gum as a function of external stimuli, such as temperature, pH, salt addition etc. is presented. Then the immobilization protocol of anticancer drugs and gold nanoparticles within gellan-based hydrogel matrix is discussed. Release of anticancer drugs from gellan gel matrix to outer solution is considered. Cytotoxicity of gellan gum-immobilized gold nanoparticles together with their anticancer activity...

JUNIPER PUBLISHERS- ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract In order to break down the glycoside bond in glucomannan obtained from the bulb of the Konjac in Việt Nam, we used the extract from bacteria bacillus subtilis. The reaction was carried out at 40oC for 6h, pH 5 and the E/S ratio of 0.4(w/w). The obtained oligo-glucomannan after hydrolysis that had molecular weight lower than 1748Da was tested for glucose tolerence in experimental animals. The test results showed that the hydrolyzed glucomannan at a dose of 6g/kg was more effective in lowering blood glucomannan in mouse models that were made to have blood sugar increase exogenously by oral admistration, as compared to original glucomannan. Keywords: Hydrolyzed glucomannan; Enzyme; Blood sugar Introduction Glucomannan is a water-soluble polysaccharide consisting of D-mannose and D-glucose units linked with β - (1→ 4) glucosidic bonds, with the degree of branching of a...

Juniper publishers- Academic Journal of Polymer Science Authored by  Darvishi R VCM suspension polymerization is performed as the batch-wise process. For this, the productivity of this high demand product is low. As VCM suspension polymerization is an exothermic process, the full capacity of the cooling system remains idle most of the time during the course of the polymerization.There are three strategies for keeping the reaction rate constant during the entire polymerization process. fast initiator dosage during reaction, cocktail initiator system and the temperature trajectory are the strategies that one can utilize to maintain the polymerization reaction rate at a constant value close to the allowed maximum rate. There are several reports that investigated separately the PVC resin properties obtained by these modes of polymerization. However, no report is published to compare the specifications of each mode together and also the PVC resin properties prepared...

JUNIPER PUBLISHERS- ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Waste plastic poses a dire threat to life on earth and addressing this crisis must be considered to be a priority in the field of polymer science. In this piece, several approaches to waste plastic handling are discussed, with their costs, benefits and potential for sustainability briefly outlined. Keywords: Waste plastic; Plastic pollution; Polymer; Environmental impact Introduction Virtually every eco-system on Earth is threatened by plastic pollution, directly or indirectly [1-6]. The persistent toxic nature of plastic once it has entered the environment means that plastic pollution is, arguably, a more severe long-term environmental threat than climate change. Polymer research must therefore consider environmental impact as an urgent priority for ensuring the survival of the polymer industry and, indeed, the human species. It follows that polymer design phi...

JUNIPER PUBLISHERS- ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Ionic liquid has been used as a novel dispersant for fillers in polymer matrix. Enhanced interfacial interaction between reinforcing material and polymer matrix leads to smart materials. Use of ionic liquid as a modifier is environmentally friendly method to fabricate nanocomposites potential applications. Keywords: Ionic liquid; Polymer matrix; Interfacial interaction; Potential applications Abbrevations: RTILs: Room-Temperature Ionic Liquids; MWCNT: Multiwalled Carbon Nanotube; GO: Graphene Oxide; BNNS: Boron Nitride Nanosheets; BIIR: Bromo butyl Rubber; ILs: Ionic Liquids; GO-ILs: Modified Graphene Oxide; MEMS/NEMS: Micro/Nanoelectromechanical Systems; ZIL: Zwitterionic Imidazolium-Based Ionic Liquid Ionic liquid as a Functional Dispersant for Nanomaterials in Polymer matrix Potential applications as well as strength and durability of polymers can be enrich...

JUNIPER PUBLISHERS- Academic Journal of Polymer Science Opinion Charles Goodyear discovered in 1839 that heating raw rubber with sulfur modified the rubber to retain its shape. Over the years, there has been an increasing trend to use more chemical curatives in rubber compounds. Excessive use of the chemical curatives is harmful to health, safety and the environment and their use is restricted by the new European chemicals policy, Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) and various legislations for environment and safety [1,2]. Sulfenamide accelerators and zinc oxide (ZnO) are used extensively to cure a wide range of industrial rubber articles. However, these chemicals cause eye, skin and respiratory irritation in human and are harmful to aquatic life. Zinc oxide was treated with N-tert-butyl-2-benzothiazole sulfenamide (TBBS) accelerator in ethyl acetate solvent to provide a convenient single material component to use as...

JUNIPER PUBLISHERS-   Academic Journal of Polymer Science News Nonmetallic materials, which are widely used, have for the most part the polymer nature. These materials include hydrocarbon polymers and inorganic high-molecular compounds that do not contain hydrocarbon groups. Every class of polymers has a number of advantages and disadvantages that requires specific problems to be solved. Inorganic polymers comprising up to 80% of the Earth’s crust involve mono elemental polymers (C n , S i n, G en , P n , B n , A sn , S bn , B in , T en , S en , S n ), polyoxides, borides, nitrides, silicides, phosphides, carbides. Polyoxides (silicates, phosphates, aluminates, borates, germanates, titanates, complex polyoxides - clays, etc.) present the most widespread class of inorganic polymers, which is of greatest interest from the point of view of synthesis, properties, and the possibility of wide application. Inorganic polyoxides have a number of important propertie...