A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Reddy, P. V.
- Battery Separator Grade PVC Resin for Possible Insulation Applications
Authors
1 Central Power Research Institute, Bangalore - 560080, IN
Source
Power Research, Vol 7, No 1 (2011), Pagination: 73-78Abstract
An emulsion grade resin has been checked for the purpose of battery grade separator properties along with suspension grade PVC resin for insulation purpose. The study suggests that when battery separator resin CP172SG is added to K6701, the elongation property decreases with an increase in its content, i.e. the material attains rigidity, suggesting that CP172SG is not a good absorbent of plasticizer. It has been confirmed that the particle sizes of these two resins are not the same and a just physical mixing need not be a homogeneous mixture; and this could affect the properties of the compounded material intended to use for HT cable. The samples CP172SG and K6701 both may be used for LT PVC cable sheathing, and CP172SG cannot be used in XLPE (cross-linked polyethylene) LT cables. However, only sample K 6701 can be used for insulation.Keywords
Battery Separator Grade Resin, Suspension Grade Resin, LT Cable, HT Cable, Cross-linked Polyethylene.
- Technology Development for Flame-Retardant Low-Smoke Material for Wire and Cables for Sheathing Applications
Authors
1 Central Power Research Institute, Bangalore - 560080, IN
Source
Power Research, Vol 7, No 1 (2011), Pagination: 79-88Abstract
An attempt was made to develop technology for low-smoke flame-retardant cable and compound with elimination of toxic chemicals in the formulation. The extrusion trials using twin screw extruder and cable coating with single screw extruder were successful. Results of the evaluation of the cable and compound suggest that the composition seems to be satisfactory. However, large-scale production could not be taken due to the actual technoeconomic viability of the commercialization. This study paved the way for DSIR-sponsored project for commercial exploitation under PATSER scheme.Keywords
PVC Resin, Stabilizer, Plasticizer, Single Screw Extruder, Flame-Retardant Low-Smoke (FRLS), Compounding
- The Structure and Cure Mechanism of 2, 3-Bis (Benzimidazolyl) Pyridine with an Epoxy Resin System
Authors
1 Polymer Laboratory, Central Power Research Institute (CPRI), Bengaluru - 560 080, IN
2 Department of Chemistry, Central College, Bangalore University, Bengaluru - 560 001, IN
3 Department of Inorganic and Physical Chemistry, Indian Institute of Science (IISc), Bengaluru - 560 012, IN
Source
Power Research, Vol 5, No 1 (2009), Pagination: 47-56Abstract
2, 3-bis (benzimidazolyl) pyridine was synthesised and characterised by CHN analysis and techniques like infrared spectra, mass spectra and NMR studies. The structure was established using the X-ray crystallography technique.
The cure behaviour of 2, 3-bis (benzimidazolyl) pyridine has been investigated with bisphenol-A based epoxy resin with an anhydride hardener. The study has revealed that this ligand behaves like an accelerator by reducing the cure and gel times of the resin system. Kinetic studies based on DSC showed that the rate of curing increased with enhanced concentration of this accelerator. The electrical properties of the cured epoxy resin were unaffected with lower concentrations of 2, 3-bis (benzimidazolyl) pyridine. A mechanism for curing has been proposed based on infrared spectral studies which indicate the involvement of the secondary and tertiary nitrogen of 2, 3-bis (benzimidazolyl) pyridine which enhances the cross-linking of the resin system.