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Bekhouche S, Trache D, Chelouche S, Abdelaziz A, Tarchoun AF, Benchaa W, Benameur S, Mezroua A. Investigation of the Thermal Aging Behavior of Pyrotechnic Tracer Composition by Spectroscopic Techniques Coupled with Principal Component Analysis. PROPELLANTS EXPLOSIVES PYROTECHNICS 2021. [DOI: 10.1002/prep.202100019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Slimane Bekhouche
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Djalal Trache
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Salim Chelouche
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Amir Abdelaziz
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Ahmed Fouzi Tarchoun
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
- Energetic Propulsion Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Widad Benchaa
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Sabrine Benameur
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Abderrahmane Mezroua
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
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Huang T, Li R. The effect of metal salts on polyurethane foam: antioxidation and reduction of VOCs emissions. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02524-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Li H, Xiao R. Glass Transition Behavior of Wet Polymers. MATERIALS 2021; 14:ma14040730. [PMID: 33557319 PMCID: PMC7915364 DOI: 10.3390/ma14040730] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 01/26/2021] [Accepted: 02/01/2021] [Indexed: 11/16/2022]
Abstract
We have performed a systematical investigation on the glass transition behavior of amorphous polymers with different solvent concentrations. Acrylate-based amorphous polymers are synthesized and treated by isopropyl alcohol to obtain specimens with a homogenous solvent distribution. The small strain dynamic mechanical tests are then performed to obtain the glass transition behaviors. The results show that the wet polymers even with a solvent concentration of more than 60 wt.% still exhibit a glass transition behavior, with the glass transition region shifting to lower temperatures with increasing solvent concentrations. A master curve of modulus as a function of frequency can be constructed for all the polymer-solvent systems via the time-temperature superposition principle. The relaxation time and the breadth of the relaxation spectrum are then obtained through fitting the master curve using a fractional Zener model. The results indicate that the breadth of the relaxation spectrum has been greatly expanded in the presence of solvents, which has been rarely reported in the literature. Thus, this work can potentially advance the fundamental understanding of the effects of solvent on the glass transition behaviors of amorphous polymers.
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Affiliation(s)
- Hai Li
- College of Mechanics and Materials, Hohai University, Nanjing 210098, China;
| | - Rui Xiao
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
- Correspondence:
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4
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Ahmadi SH, Keshavarz MH, Atabak HRH. Correlations Between Laser Induced Breakdown Spectroscopy (LIBS) and Dynamical Mechanical Analysis (DMA) for Assessment of Aging Effect on Plastic Bonded Explosives (PBX). Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800501] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Seyyed Hamid Ahmadi
- Chemistry & Chemical Engineering Research Center of IranP.O. Box: 14335186; Tehran Iran
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5
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Ahmadi SH, Keshavarz MH, Hafizi Atabak HR. Introducing Laser Induced Breakdown Spectroscopy (LIBS) as a Novel, Cheap and Non-destructive Method to Study the Changes of Mechanical Properties of Plastic Bonded Explosives (PBX). Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800415] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Seyyed Hamid Ahmadi
- Chemistry & Chemical Engineering Research Center of IranP.O. Box: 14335186; Tehran Iran
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6
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Anokhin DV, Gorbunova MA, Estrin YI, Komratova VV, Badamshina ER. The role of fast and slow processes in the formation of structure and properties of thermoplastic polyurethanes. Phys Chem Chem Phys 2018; 18:31769-31776. [PMID: 27841401 DOI: 10.1039/c6cp05895g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New multi-blocked thermoplastic polymers containing rigid polyurethane-urea and soft polydiethylene glycol adipate blocks have been synthesized. Basic features of their structure formation have been revealed. Three types of supramolecular organization have been found, which define the behavior of samples under heating and deformation conditions. The shape memory effect has been interpreted through the transition of one type of morphology to another. The variation of the functional characteristics of the material was addressed in the process of long-time storage at room temperature. The changes of physical-mechanical and thermodynamical properties of the materials were related to structural evolution within 60 months of storage. The competing role of crystallization and phase separation was proposed to explain the unusual mechanical behavior of the materials.
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Affiliation(s)
- D V Anokhin
- IPCP RAS, Semenov Prospect 1, Chernogolovka, 141432, Russia. and Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, GSP-1, 1-51 Leninskie Gory, Moscow, 119991, Russia
| | - M A Gorbunova
- IPCP RAS, Semenov Prospect 1, Chernogolovka, 141432, Russia.
| | - Ya I Estrin
- IPCP RAS, Semenov Prospect 1, Chernogolovka, 141432, Russia.
| | - V V Komratova
- IPCP RAS, Semenov Prospect 1, Chernogolovka, 141432, Russia.
| | - E R Badamshina
- IPCP RAS, Semenov Prospect 1, Chernogolovka, 141432, Russia.
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7
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Mebarki F, David E. Dielectric characterization of thermally aged recycled Polyethylene Terephthalate and Polyethylene Naphthalate reinforced with inorganic fillers. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24602] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fouzia Mebarki
- École de technologie supérieure; 1100 Notre-Dame Street West, Montreal Quebec H3C 1K3 Canada
| | - Eric David
- École de technologie supérieure; 1100 Notre-Dame Street West, Montreal Quebec H3C 1K3 Canada
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8
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Hui M, Yu-Cun L, Tao C, Tuo-Ping H, Jia-Hu G, Yan-Wu Y, Jun-Ming Y, Jian-Hua W, Ning Q, Liang Z. Kinetic studies on the cure reaction of hydroxyl-terminated polybutadiene based polyurethane with variable catalysts by differential scanning calorimetry. E-POLYMERS 2017. [DOI: 10.1515/epoly-2016-0245] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThis paper employs differential scanning calorimetry (DSC) to investigate the reactions of hydroxyl-terminated polybutadiene (HTPB) binder and isophorone isophorone diisocyanate (IPDI) with two different cure catalysts, namely, dibutyl tin dilaurate (DBTDL) and stannous octanoate (TECH). This study evaluates the effects of two cure catalysts (i.e. DBTDL and TECH) on rate constants of the polyurethane cure reactions. Throughput the study, the kinetic parameters and the curing reaction rate equations are obtained. The present work concludes that both catalysts had a catalytic effect on the HTPB-IPDI system, but that the catalytic effect of DBTDL was higher than that of TECH. The binder system with the TECH catalyst displayed a longer pot-life and lower toxicity compared with the DBTDL. Additionally, this study investigates the binder system’s viscosity build-up at 35°C and the viscosity build-up results were in agreement with the DSC analysis results.
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Affiliation(s)
- Ma Hui
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
| | - Liu Yu-Cun
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
| | - Chai Tao
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
| | - Hu Tuo-Ping
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
| | - Guo Jia-Hu
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
- 2Department of ESH, Science and Technology University of Sichuan Staff, Chengdu 610101, China
| | - Yu Yan-Wu
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
| | - Yuan Jun-Ming
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
| | - Wang Jian-Hua
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
| | - Qin Ning
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
| | - Zhang Liang
- 1Chemical Engineering and Environment College, North University of China, Taiyuan 030051, China
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Blecker K, Hadim H. Characterization of the Thermal Response of Munitions in Storage Exposed to Real and Arbitrary Weather Conditions. PROPELLANTS EXPLOSIVES PYROTECHNICS 2016. [DOI: 10.1002/prep.201500148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Fan W, Li JL, Zheng YY, Liu TJ, Tian X, Sun RJ. Influence of thermo-oxidative aging on the thermal conductivity of carbon fiber fabric reinforced epoxy composites. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2015.11.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Zhou Q, Jie S, Li BG. Facile synthesis of novel HTPBs and EHTPBs with high cis-1,4 content and extremely low glass transition temperature. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.04.078] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Du K, Yang G, Yuan Z, Xu W, Liang X. Migration of additives toward the surface during aging of epoxy coating by infrared spectroscopy. J Appl Polym Sci 2013. [DOI: 10.1002/app.40051] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Keli Du
- Key Laboratory of Aerospace Advanced Materials and Performance (Ministry of Education); School of Materials Science and Engineering; Beihang University; Beijing 100191 China
| | - Guang Yang
- Key Laboratory of Aerospace Advanced Materials and Performance (Ministry of Education); School of Materials Science and Engineering; Beihang University; Beijing 100191 China
| | - Zehong Yuan
- Key Laboratory of Aerospace Advanced Materials and Performance (Ministry of Education); School of Materials Science and Engineering; Beihang University; Beijing 100191 China
| | - Wen Xu
- Aerospace Research Institute of Materials and Processing Technology; Beijing 100076 China
| | - Xiaofan Liang
- Aerospace Research Institute of Materials and Processing Technology; Beijing 100076 China
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