Acoustic Absorption and Dynamic Viscosity in a Long‐Chain Polymer

1967 ◽  
Vol 42 (5) ◽  
pp. 1041-1044 ◽  
Author(s):  
J. L. Hunter ◽  
P. R. Derdul
Keyword(s):  
Dynamic Viscosity ◽  
Acoustic Absorption ◽  
Chain Polymer ◽  
Long Chain

scholarly journals Acoustic Absorption and Dynamic Viscosity in Polymers

1966 ◽  
Vol 39 (6) ◽  
pp. 1229-1229
Author(s):  
Joseph L. Hunter ◽  
Henry D. Dardy ◽  
P. R. Derdul
Keyword(s):  
Dynamic Viscosity ◽  
Acoustic Absorption

Characterization of the drag-reducing nature of long-chain polymer–water solutions through atomization

2018 ◽  
Vol 23 (5) ◽  
pp. 430-434
Author(s):  
Shitanshu Devrani ◽  
Rahul Kumar Tiwari ◽  
Rajat Sharma ◽  
Mathur P. Rajesh ◽  
Ashish Kapoor
Keyword(s):  
Chain Polymer ◽  
Water Solutions ◽  
Long Chain

scholarly journals One-pot route to graft long-chain polymer onto silica nanoparticles and its application for high-performance poly(l-lactide) nanocomposites

RSC Advances ◽  
2019 ◽  
Vol 9 (24) ◽  
pp. 13908-13915 ◽  
Author(s):  
Xin Wen
Keyword(s):  
Silica Nanoparticles ◽  
High Performance ◽  
Synthetic Route ◽  
One Pot ◽  
Chain Polymer ◽  
Long Chain

A facile “one-pot” synthetic route is used to modify SiO2 nanoparticles with a long-chain polymer, and to prepare high-performance poly(l-lactide) nanocomposites.

USE OF DRAG REDUCER CHEMICAL IN THE BASS STRAIT CRUDE OIL PRODUCING SYSTEM

1985 ◽  
Vol 25 (1) ◽  
pp. 119
Author(s):  
Jan Wilmshurst
Keyword(s):  
Natural Gas ◽  
Crude Oil ◽  
Joint Venture ◽  
Processing System ◽  
Daily Production ◽  
Chain Polymer ◽  
Gas Processing ◽  
Gear Pumps ◽  
Oil And Natural Gas ◽  
Long Chain

Esso Australia Ltd (on behalf of the Esso/BHP joint venture) operates a crude oil and natural gas processing system based on the offshore fields in Bass Strait.Crude oil is discharged from the offshore fields via a 132-km pipeline to the crude stabilization plant at Longford. A 187-km pipeline is then used to transfer stabilized crude to Long Island Point, where the oil is held in storage prior to discharge to Australian refineries and to export.Without the use of drag reducer chemical, Bass Strait crude production is limited by pipeline hydraulic capacity. Since the last quarter of 1983, drag reducer has been injected at both Halibut platform and Longford as required to meet the demand for crude oil. As a result, daily production rates have been increased by more than ten per cent.Drag reducer chemical is a long chain polymer which acts to reduce the extent of turbulence in the flowing oil stream. The chemical is highly viscous, and specifically designed gear pumps are required to achieve satisfactory injection into the pipeline systems.

Effect of HCl Concentration and Acetone Washing on the Dielectric and Conduction Properties of Polyaniline Salts

2021 ◽  
Vol 14 ◽  
Author(s):  
Jayashree Mohanty ◽  
S.R. Mishra ◽  
Tanmaya Badapanda ◽  
S. Anwar
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Acid Concentration ◽  
Charge Carriers ◽  
Short Chain ◽  
Water Medium ◽  
Distilled Water ◽  
Chain Polymer ◽  
Pani Salt ◽  
Long Chain

Aims: The aim of the work is to study the effect of acid concentration and acetone washing on electrical properties of Polyaniline (PANI) salts prepared through chemically oxidative polymerization. Background: The frequency dependent conductivity and dielectric permittivity provide important information on the electrical properties of conducting polymers which gives information regarding their utility in electronic applications. Objective: Hence, the present study is based on the comparative the electrical properties study (dielectric and electrical conductivity) of PANI salts prepared in two different media like water and 1M HCl along with study regarding effect acetone washing on the said electrical properties of the polymer samples. Methods: PANI salts are synthesized through chemical oxidative polymerisation of aniline hydrochloride with the oxidant ammonium persulphate in two different media like water and 1M HCl. One part of the PANI salt samples were washed with distilled water after synthesis and another part of the polymer samples were washed with distilled water followed by acetone to study the effect of acetone washing on the electrical properties of polymer samples. Results: Non-acetone washed PANI salt prepared in water medium shows the highest dielectric as well as electrical conductivity due to the increased charge carriers provided both by long chain polymer as well as short chain oligomers. When the acid concentration is increased to 1M there may be loss of protons accompanied by pairing of free radicals to form quinoimine units that leads to the loss of charge carriers consequently decreasing the dielectric constant and electrical conductivity. Conclusion : PANI salt prepared in water shows the highest dielectric as well as conductivity due to the increased charge carriers provided both by long chain polymer as well as short chain oligomers.

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