The Production of Chemically Resistant Thermoplastic Elastomeric Materials by the Reactive Extrusion of Polyamide and Butyl Rubber Polymers and their Application to Chemical Protective Equipment

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Authors
  1. Van Dyke, J.D.
  2. Gnatowski, M.
Corporate Authors
Defence R&D Canada - Suffield, Ralston ALTA (CAN);Trinity Western Univ, Langley BC (CAN);Polymer Engineering Co Ltd, Burnaby BC (CAN)
Abstract
This report presents the results of blending experiments over a three year period primarily on dynamically vulcanised polyamide I chlorobutyl blends. The project objective was to prepare thermoplastic elastomeric blends that had properties of interest for defence applications, including penetration of HD, for use in clothing, boots and face ware applications. Overall, a total of 234 blends were conducted during the life of this contract. A variety of blend compositions were prepared, including variations in polyamide I rubber ratio, and curing system. Formulations, methods of blend preparation, and material testing methods are described. Blends were prepared in a small scale high shear internal mixing system. Test specimens were primarily made by injection moulding of the blended material, or by extrusion into films or tapes. For many of the blends prepared, the microstructure swelling index, tensile strength, elongation at break, hardness, and resistance to penetration/re-emission of chemical warfare agents were tested. The results show that butyl rubbers, and especially chlorobutyl rubber (CW), can be blended with polyamides (especially Nylon 12) to obtain materials with good mechanical properties and good resistance to penetration/re-emission to CW agents. Successful samples were prepared by extrusion with excellent appearance and resistance to penetration/re-emission. Selected results were presented during the IUPAC World Polymer Congresses in Beijing (July 7, 2002) and i
Keywords
Polyamide 12;chlorobutyl rubber;dynamic vulcanisation;swelling index;microstructure;tensile strength;elongation at break;hardness;resistance to penetration;re-emission;Dynamic vulcanization
Report Number
DRDC-SUFFIELD-CR-2006-201 — Contractor Report
Date of publication
01 Mar 2005
Number of Pages
82
DSTKIM No
CA028850
CANDIS No
527031
Format(s):
Hardcopy;Document Image stored on Optical Disk

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