TY - JOUR
T1 - High Azide Content Hyperbranched Star Copolymer as Energetic Materials
AU - Zhang, Guangpu
AU - Chen, Gangfeng
AU - Li, Jinqing
AU - Sun, Shixiong
AU - Luo, Yunjun
AU - Li, Xiaoyu
N1 - Publisher Copyright:
© Copyright 2018 American Chemical Society.
PY - 2018/10/24
Y1 - 2018/10/24
N2 - A series of star azide copolymers (b-POBs) with hyperbranched polyether cores (HBPO-c) and short linear poly(3,3′-bis-azidomethyl oxetane) arms (PBAMO-a) have been prepared. The polymers were characterized with FT-IR, 1H NMR, quantitative 13C NMR, gel permeation chromatography, MALDI-TOF, and X-ray diffractometry. Due to hyperbranched structures, the crystallinity (Wc) of b-POBs was significantly decreased, and the processability was greatly improved. The enthalpy of formation, obtained by oxygen bomb calorimetric measurements, high azide content, and heats of decomposition of b-POBs demonstrated their remarkable energy level. Furthermore, b-POBs had good resistance to pyrolysis up to 230 °C (T5%), and their mechanical sensitivities were also obviously lower than that of the PBAMO homopolymer, showing their good safety properties. Moreover, the mechanism for sensitivity reduction of b-POBs was established by analyzing the relationship between the activation course in mechanical stimulus and its crystalline structure.
AB - A series of star azide copolymers (b-POBs) with hyperbranched polyether cores (HBPO-c) and short linear poly(3,3′-bis-azidomethyl oxetane) arms (PBAMO-a) have been prepared. The polymers were characterized with FT-IR, 1H NMR, quantitative 13C NMR, gel permeation chromatography, MALDI-TOF, and X-ray diffractometry. Due to hyperbranched structures, the crystallinity (Wc) of b-POBs was significantly decreased, and the processability was greatly improved. The enthalpy of formation, obtained by oxygen bomb calorimetric measurements, high azide content, and heats of decomposition of b-POBs demonstrated their remarkable energy level. Furthermore, b-POBs had good resistance to pyrolysis up to 230 °C (T5%), and their mechanical sensitivities were also obviously lower than that of the PBAMO homopolymer, showing their good safety properties. Moreover, the mechanism for sensitivity reduction of b-POBs was established by analyzing the relationship between the activation course in mechanical stimulus and its crystalline structure.
UR - http://www.scopus.com/inward/record.url?scp=85054977566&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.8b03596
DO - 10.1021/acs.iecr.8b03596
M3 - Article
AN - SCOPUS:85054977566
SN - 0888-5885
VL - 57
SP - 13962
EP - 13972
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 42
ER -