A Review on Enhanced Productivity Approaches in VCM Suspension Polymerization- Juniper publishers- Open access Journals

Juniper publishers- Academic Journal of Polymer Science

A Novel Empirical Approach to Estimate the Acoustic Properties of Smart Materials: Part I- Open access Journals- Juniper Publishers

Juniper publishers- Academic Journal of Polymer Science

Authored by Francesca Nanni

A Novel Empirical Approach to Estimate the Acoustic Properties of Smart Materials

In this work, a novel empirical approach to the estimation of the rheological behaviour of smart materials from the sound insulation capabilities is proposed. The testing protocol relies on a small sound research facility that was designed with the goal of achieving a movable yet flexible measurement system, suitable for both laboratory environments and quality assurance departments.

Unlike other test protocols relying on lightweight acoustic research solutions, the proposed methodology was developed to perform acoustic tests in a diffused field environment, a test condition much closer to real life applications, and in a sufficiently wide frequency range (eg. 2 -10kHz).

The proposed test methodology was validated by means of modal analysis of the chamber and by comparison between empirical acoustical test results (insertion loss) and the expected theoretical results.

At last, as a proof of concept, it is showed how to apply the proposed protocol to the measurement of the sound insulation of a novel laminate containing a nano composite core and how to evaluate indirectly the rheological behaviour merely from acoustical data.

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Surface Modification and Application of Nanomaterials in Biotechnology- Juniper Publishers- Open access journals

Juniper publishers- Academic Journal of Polymer Science

Authored by Hélio Ribeiro

Surface Modification and Application of Nanomaterials in Biotechnology

In the last years, inorganic nanostructures as carbon nanotubes, graphene, hexagonal boron nitride, and metallic nanoparticles have been applied in several biomedical and nanotechnology fields. These different types of nanomaterials also are awakened as new perspectives in prophylactic, diagnostic and therapeutic areas. However, the uses depends strongly on their chemical and physical surfaces that display an important role in their biocompatibility in different biological systems. A brief study of several types of nanomaterials, their modifications and biomedical application is the main contribution of this short communication.

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Polymer Science, From Academic to All, Open access journal-juniper Publishers

Juniper publishers- Academic Journal of Polymer Science

Authored by Cheng Chen

For over a century, polymer science has experienced many important developments, and many achievements have been made on the basis of theoretical and empirical research. Polymers have unique properties such as high strength, toughness and elasticity due to their intermolecular behavior causing by the large molecular weight and long molecular chain, which are very different from those of small molecules. Polymer compounds are ubiquitous in nature, including the protein and cellulose that make up the organism, nucleic acids that carrying biological genetic information, and raw materials of clothes such as cotton, wool and silk. On the other hand, synthetic polymers play an important role in polymer science. Such kinds of polymers are produced from small molecules via poly-addition or poly-condensation method. Nowadays, polymers are indispensable in people’s life, and the researches aimed at solving scientific problems as well as particle applications needs to be strengthened, with emphasis on spreading academic reporting articles to the public.

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Energy Potential of Natural, Synthetic Polymers and Waste Materials - A Review, Open access Journals- Juniper Publishers

Juniper publishers- Academic Journal of Polymer Science

Authored by Michael Ioelovich

Energy Potential of Natural, Synthetic Polymers and Waste Materials

In this paper, the energy potential of natural (polysaccharides, lignin, etc.), and synthetic polymers (polyolefins, etc.), polymer materials (plant biomass, plastics and their solid waste), as well as combustible liquids and gases derived from them has been studied. To determine calorific values of solid, liquid and gaseous substances, various experimental and calculation methods were used. For this purpose, improved equations based on chemical structure and elemental analysis was proposed. It was shown that the conversion of solid materials into liquids or gases reduces the yield of thermal energy. Therefore for the production of thermal energy, it is more profitable to burn the solid biomass or plastic than combustible liquids and gases, derived from them. Studies have shown that lipids and lignin increase, whereas moisture and ash reduce the calorific value of biomass. The calorific value of most synthetic polymers and plastics is higher than that of biomass samples, but resources of waste plastics are about 10 times lower than these of biomass. The use of compacted mixture of biomass and plastic waste enables to obtain solid fuels with unique properties, such as increased calorific value and energy density, as well as reduced emission of carbon dioxide. Considering the total amount of biomass and plastics waste destined for combustion, it was calculated that current annual energy potential of the waste materials is about 145 EJ. The increase the share of biomass in the production of alternative energy can simultaneously contribute to reducing in greenhouse gas emission and improving the ecological state of the environment.

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Influence of the Magnetite Nanoparticles on Dielectric Properties of Nanocomposites on the Basis of Linear Polyethylene of Low Density, Open access Journals-Juniper Publishers

Juniper publishers- Academic Journal of Polymer Science

Authored by Novikov GF

Influence of the Magnetite Nanoparticles on Dielectric Properties of Nanocomposites on the Basis of Linear Polyethylene of Low Density.

The nanocomposite of magnetite/linear low-density polyethylene has been synthesized. Influence of magnetite nanoparticles in concentration 1-20wt% on dielectric properties and conductivity of nanocomposites in the range of frequencies 10-2-105Hz and temperatures from 113 to 383K have been studied. Inclusion of particles of magnetite in polyethylene slightly changed melting temperature. But at the same time an imaginary part of complex dielectric permittivity increased sharply (on two orders of size) and enthalpy of fusion decreased by 25J/g. Development of polymeric composition materials is one of the priority directions of development of modern technologies and the equipment. A unique combination of valuable properties of polymeric matriсes such as film formation, mechanical strength, chemo-and corrosion resistance, on the one hand, and functional properties of nanodimensional fillers, -with another hand, allows to consider such materials as perspective for use in aerospace technology, instrument making, microelectronics, medicine and other hi-tech fields of the industry [1].

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