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Preparation and Mechanical Sensitivity of HMX/HTPB Composite Particles

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年02期
Page:
267-271
Research Field:
Publishing date:

Info

Title:
Preparation and Mechanical Sensitivity of HMX/HTPB Composite Particles
Author(s):
AN Chong-wei12GUO Xiao-de1XIE Wu-xi3SONG Xiao-lan1WANG Yi1LI Feng-sheng1
1.School of Chemical Engineering,NUST,Nanjing 210094,China;2.Chemical Industry and Ecology Institute,North University of China,Taiyuan 030051,China;3.Department of Propellants,Xi’an Modern Chemistry Research Institute,Xi’an 710065,China
Keywords:
cyclotetramethylene tetranitramine hydroxyl terminated polybutadiene surface coating composite particles mechanical sensitivity
PACS:
TQ564
DOI:
-
Abstract:
To reduce the mechanical sensitivity of cyclotetramethylene tetranitramine(HMX),hydroxyl terminated polybutadiene(HTPB) and toluene diisocyanate(TDI) are used to coat HMX by the method of phase separation.The coated samples are characterized by SEM(scanning electron microscope) and XPS(X-ray photoelectron spectrometry).The mechanical sensitivity of unprocessed and coated HMX samples are measured and contrasted.The influence of coating processing on coating effect and mechanical sensitivity are discussed,and the coating mechanism and insensitive mechanism are analyzed.The results show that when coated with HTPB and TDI simultaneously,the samples form agglomeration easily and their friction sensitivity reduces,however the impact sensitivity increases.After coated with 1% HTPB,the drop height H50 of HMX decreases from 32.5 cm to 28.6 cm and explosion probability P decreases from 100% to 46%.When firstly coated with HTPB and then with TDI,the samples disperse well and the coating layers become even.The mechanical sensitivity reduces obviously.When the covering mass amount of HTPB is 1%,H50 increases to 45.7 cm,and P decreases to 32%.

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Last Update: 2012-11-19