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Journal articles on the topic 'Hydroxyl terminated poly-butadiene'

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Author: Grafiati

Published: 6 September 2023

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1

Uscumlic, Gordana, Mohamed Zreigh, and Dusan Mijin. "Investigation of the interfacial bonding in composite propellants. 1,3,5-trisubstituted isocyanurates as universal bonding agents." Journal of the Serbian Chemical Society 71, no. 5 (2006): 445–58. http://dx.doi.org/10.2298/jsc0605445u.

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A series of 1,3,5-trisubstituted isocyanurates (substituents: CH2CH2OH CH2CH=CH2 and CH2CH2COOH) was synthesized according to a modified literature procedure. Experimental investigations included modification of the synthetic procedure in terms of the starting materials, solvents, temperature isolation techniques, as well as purification and identification of the products. All the synthesized isocyanurates were identified by their melting point and FTIR, 1H NMR and UV spectroscopic data. Fourier transform infrared spectrophotometry was also used to study the interaction between ammonium perchlorate, hydroxyl terminated poly(butadiene), carboxyl terminated poly(butadiene), poly(butadiene-co-acrylonitrile), poly(propylene ether) cyclotrimethylenetrinitramine and the compounds synthesized in this work which can serve as bonding agents. The results show that tris(2-hydroxyethyl)isocyanurate is a universal bonding agent for the ammonium perchlorate/carboxyl terminated poly(butadiene)/cyclotrimethylenetrinitramine composite propellant system.

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2

Xiang, Dong, Miao Liu, Guanliang Chen, Teng Zhang, Li Liu, and Yongri Liang. "Optimization of mechanical and dielectric properties of poly(urethane–urea)-based dielectric elastomers via the control of microstructure." RSC Advances 7, no. 88 (2017): 55610–19. http://dx.doi.org/10.1039/c7ra11309a.

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In this work, we fabricated hydroxyl-terminated butadiene–acrylonitrile copolymer-based poly(urethane–urea) dielectric elastomers, and investigated the relationship between multi-length scale structure and dielectric, mechanical properties.

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3

Brzic, Sasa, Ljiljana Jelisavac, Jela Galovic, Danica Simic, and Jelena Petkovic. "Viscoelastic properties of hydroxyl-terminated poly(butadiene) based composite rocket propellants." Chemical Industry 68, no. 4 (2014): 435–43. http://dx.doi.org/10.2298/hemind130426067b.

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In the present study, the viscoelastic response of three composite solid propellants based on hydroxyl-terminated poly(butadiene), ammonium perchlorate and aluminum has been investigated. The investigation was surveyed by dynamic mechanical analysis over a wide range of temperatures and frequencies. The mechanical properties of these materials are related to the macromolecular structure of the binder as well as to the content and nature of solid fillers. The storage modulus, loss modulus, loss factor and glass transition temperature for each propellant sample have been evaluated. The master curves of storage (log G' vs log ?) and loss modulus (log G'' vs log ?) were generated for each propellant. A comparison of logaT vs temperature curves for all propellants indicate conformance to Williams-Landel-Ferry equation. Choosing the glass transition as the reference temperature, WLF equation constants are determined. Fractional free volume at the glass transition temperature and thermal coefficient of free volume expansion values are in accordance with the consideration that Al is reinforcing filler.

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4

Tanver, Abbas, Mu Hua Huang, Yun Jun Luo, and Ze Huan Hei. "Chemical Kinetic Studies on Polyurethane Formation of GAP and HTPB with IPDI by Using In Situ FT-IR Spectroscopy." Advanced Materials Research 1061-1062 (December 2014): 337–41. http://dx.doi.org/10.4028/www.scientific.net/amr.1061-1062.337.

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The high-performance solid propellants play very important role in defense industry, which required highly energetic binders with good mechanical properties. In order to get the activation parameters for energetic binders, In-Situ FT-IR spectroscopic technique is used to study the chemical kinetics of glycidyl azide polymer (GAP) and hydroxyl terminated poly butadiene (HTPB) with isophorone diisocyanate (IPDI) at various temperatures. The reaction was followed by monitoring the change in intensity of the absorption band of NCO stretching at 2257cm-1and CO stretching at 1731cm-1. The polyurethane reaction has been found to be second order and the rate constant seems to be different between GAP/IPDI and HTPB/IPDI due to reactivity difference of OH groups. Dibutyl tin dilurate (DBTDL) was used as curing catalyst. By using Arrhenius and Eyring equations, the activation parameters were obtained at different temperatures (60, 70, 80 and 90°C). The apparent activation energy for the two systems GAP/IPDI and HTPB/IPDI were found to be 63.51 kJ mol-1and 41.06 kJ mol-1while the enthalpy and entropy of activation were found to be 62.35 kJ mol-1and-36.24 kJ.mol-1K-1, 39.08 J mol-1and-98.84 J mol-1K-1respectively.Key words: In-Situ FT-IR; glycidyl azide polymer (GAP); hydroxyl terminated poly butadiene (HTPB); chemical kinetics; polyurethane; dibutyl tin dilurate (DBTDL).

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5

Brzic, Sasa, Vesna Rodic, Mirjana Dimic, Danica Simic, Ljiljana Jelisavac, and Marica Bogosavljevic. "Influence of 1,4-butanediol on hydroxyl-terminated poly(butadiene) based composite propellant binder characteristics." Scientific Technical Review 65, no. 3 (2015): 55–60. http://dx.doi.org/10.5937/str1503055b.

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6

Sai Teja, P., B. Sudhakar, A. D. Dhass, R. Krishna, and M. Sreenivasan. "Numerical and experimental analysis of hydroxyl-terminated poly-butadiene solid rocket motor by using ANSYS." Materials Today: Proceedings 33 (2020): 308–14. http://dx.doi.org/10.1016/j.matpr.2020.04.097.

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7

Ero?lu, Mehmet S. "Characterization of the network structure of hydroxyl terminated poly(butadiene) elastomers prepared by different reactive systems." Journal of Applied Polymer Science 70, no. 6 (November 7, 1998): 1129–35. http://dx.doi.org/10.1002/(sici)1097-4628(19981107)70:6<1129::aid-app9>3.0.co;2-q.

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8

Stoeva, S., P. Kartalov, and K. Jankova. "Combined relaxation study of poly(vinyl chloride) blends with chlorinated poly(ethylene), hydroxyl-terminated poly(butadiene), and ethylene-propylene-diene terpolymer." Journal of Polymer Science Part B: Polymer Physics 36, no. 10 (July 30, 1998): 1595–608. http://dx.doi.org/10.1002/(sici)1099-0488(19980730)36:10<1595::aid-polb1>3.0.co;2-p.

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9

Subramanian, K. "Synthesis and characterization of poly(vinyl ferrocene) grafted hydroxyl-terminated poly(butadiene): A propellant binder with a built-in burn-rate catalyst." Journal of Polymer Science Part A: Polymer Chemistry 37, no. 22 (November 15, 1999): 4090–99. http://dx.doi.org/10.1002/(sici)1099-0518(19991115)37:22<4090::aid-pola7>3.0.co;2-r.

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10

Sankaran, S., and Manas Chanda. "Chemical toughening of epoxies. II. Mechanical, thermal, and microscopic studies of epoxies toughened with hydroxyl-terminated poly(butadiene-co-acrylonitrile)." Journal of Applied Polymer Science 39, no. 8 (April 20, 1990): 1635–47. http://dx.doi.org/10.1002/app.1990.070390802.

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11

Burelo, Manuel, Selena Gutiérrez, Cecilia D. Treviño-Quintanilla, Jorge A. Cruz-Morales, Araceli Martínez, and Salvador López-Morales. "Synthesis of Biobased Hydroxyl-Terminated Oligomers by Metathesis Degradation of Industrial Rubbers SBS and PB: Tailor-Made Unsaturated Diols and Polyols." Polymers 14, no. 22 (November 17, 2022): 4973. http://dx.doi.org/10.3390/polym14224973.

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Biobased hydroxyl-terminated polybutadiene (HTPB) was successfully synthesized in a one-pot reaction via metathesis degradation of industrial rubbers. Thus, polybutadiene (PB) and poly(styrene-butadiene-styrene) (SBS) were degraded via metathesis with high yields (>94%), using the fatty alcohol 10-undecen-1-ol as a chain transfer agent (CTA) and the second-generation Grubbs–Hoveyda catalyst. The identification of the hydroxyl groups (-OH) and the formation of biobased HTPB were verified by FT-IR and NMR. Likewise, the molecular weight and properties of the HTPB were controlled by changing the molar ratio of rubber to CTA ([C=C]/CTA) from 1:1 to 100:1, considering a constant molar ratio of the catalyst ([C=C]/Ru = 500:1). The number average molecular weight (Mn) ranged between 583 and 6580 g/mol and the decomposition temperatures between 134 and 220 °C. Moreover, the catalyst optimization study showed that at catalyst loadings as low as [C=C]/Ru = 5000:1, the theoretical molecular weight is in good agreement with the experimental molecular weight and the expected diols and polyols are formed. At higher ratios than those, the difference between theoretical and experimental molecular weight is wide, and there is no control over HTPB. Therefore, the rubber/CTA molar ratio and the amount of catalyst play an important role in PB degradation and HTPB synthesis. Biobased HTPB can be used to synthesize engineering design polymers, intermediates, fine chemicals, and in the polyurethane industry, and contribute to the development of environmentally friendly raw materials.

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12

Ghorbani, Mostafa, and Yadollah Bayat. "Synthesis and characterization of hydroxyl-terminated triblock copolymer of poly(glycidyl nitrate-block-butadiene-block-glycidyl nitrate) as potential energetic binder." Polymer Science Series B 57, no. 6 (November 2015): 654–58. http://dx.doi.org/10.1134/s1560090415060056.

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13

Subramanian, K. "Hydroxyl-terminated poly (azidomethyl ethylene oxide-b-butadiene-b-azidomethyl ethylene oxide)—synthesis, characterization and its potential as a propellant binder." European Polymer Journal 35, no. 8 (August 1999): 1403–11. http://dx.doi.org/10.1016/s0014-3057(98)00241-9.

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14

Zhang, Rui-Qian, Le-Bin Wang, Rui-Xue Bai, Yan-Ling Luo, Feng Xu, and Ya-Shao Chen. "Sensitive conductive polymer nanocomposites from multiwalled carbon nanotube coated with polypyrrole and hydroxyl-terminated poly(butadiene-co-acrylonitile) polyurethane for detection of chloroform vapor." Composites Part B: Engineering 173 (September 2019): 106894. http://dx.doi.org/10.1016/j.compositesb.2019.05.105.

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15

Bielawski, C. W., O. A. Scherman, and R. H. Grubbs. "Highly efficient syntheses of acetoxy- and hydroxy-terminated telechelic poly(butadiene)s using ruthenium catalysts containing N -heterocyclic ligands." Polymer 42, no. 11 (May 2001): 4939–45. http://dx.doi.org/10.1016/s0032-3861(00)00504-8.

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16

Sankaran, S., and Manas Chanda. "Chemical toughening of epoxies. I. Structural modification of epoxy resins by reaction with hydroxy-terminated poly(butadiene-co-acrylonitrile)." Journal of Applied Polymer Science 39, no. 7 (April 5, 1990): 1459–66. http://dx.doi.org/10.1002/app.1990.070390704.

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17

Singh, N. B., and A. K. Ojha. "Coprecipitation of mixture of CuO and Al2O3 through NaNO3-KNO3 eutectic mixture and its catalytic activity during the decomposition of Hydroxy terminated poly-butadiene (HTPB)." Progress in Crystal Growth and Characterization of Materials 45, no. 1-2 (January 2002): 1–7. http://dx.doi.org/10.1016/s0960-8974(02)00020-7.

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18

Awad Ebrahim Osman, Ameer. "The Relation between Burning Time and Burning Energy of HTPB - Based Composite Propellant." Journal of Karary University for Engineering and Science, December 21, 2021. http://dx.doi.org/10.54388/jkues.v1i2.77.

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This paper represented a result of several visions of chemical phenomenon and several extractions and extrapolations of experimental works which included a relationship between energy related to a chemical process and the relevant time which is required to achieve this process, but it must be taken into account that those mentioned experimental works hadn’t aimed substantially to study and state this relationship neither implicitly nor explicitly, but the results of those works have been exploited for another field after being compared with the relevant thermodynamic calculations. The selected case study for this paper was the relation between the burning time of Hydroxyl terminated poly butadiene propellant ( HTPB) and the caloric value of this material. The results reflected some relationship between the burning time and the change of the system energy during the burning process.

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19

Samosir, Ganda. "PERHITUNGAN DAN PERANCANGAN IGNITER BERBASIS KALKULASI PROPULSI ROKET (Studi Kasus Roket RX-320)." Jurnal Teknologi Dirgantara 9, no. 2 (April 10, 2012). http://dx.doi.org/10.30536/j.jtd.2011.v9.a1678.

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The solid rocket motors, like all the LAPAN’s rocket, has been using the composite fuel of Hydroxyl Terminated Poly Butadiene (HTPB) type which is not easy to self-igniting. The quite extreme environment conditions are needed in order to ignite this non-hypergolic solid fuel, such as the ambiance pressure and temperature must be about 40 bar and 280°C respectively. The aforementioned conditions must be well given by the prime igniter designed or commonly known as igniter. The performance of an igniter could be very influenced by 2 (two) massive variables; first one is the internal factor, such as: squib ingredient, filament material, primer composition, igniter main charge, and the second one is external factor, such as: propellant’s type, dimension and the configuration of the rocket’s combustion chamber. In other word, chosen the proper rocket’s igniter are depending on the type and its mission.The propulsion calculation applied in this paper to design the igniter of the rocket RX-320, gives some major variables, i.e.: the biggest tube length; = 357 mm, its outside diameter; = 51 mm, total orifices and its diameter are 165 and 4 mm respectively. iL lcφ Keywords: Extreme conditions, Internal factors, External factors.

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20

Elamin, Nagmeldin, and Ahemed M. Bashir. "Motives for Decreasing the Curing Time of HTPB-AP Composite Propellants." Journal of Karary University for Engineering and Science, December 21, 2021. http://dx.doi.org/10.54388/jkues.v1i2.64.

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One of the standard conditions for solidifying composite propellants consist of hydroxyl terminated poly-butadiene as a binder and ammonium perchlorate as oxidizer, is the curing process for certain time in a certain temperature. On this paper, the motives and reasons for the decreasing of this curing time were studied and discussed. The study and discussion include the productivity, cost, delivery, manpower, and maintenance points of view. By experiments and questionnaire work, it was seen that, all the previous points of view were affected positively. Generally, the productivity of the propellant was increased by 100%, the cost of curing process was decreased by 25% of the previous cost, the man power needed for the process of waiting and recording the readings was decreased by 50%, customer delivery process was fasted by 50% of the previous delivery time, and finally the maintenance processes due to equipment depreciation were improved by 50% from the previous. From the whole point of view, it was seen that, the decreasing of the curing time is very useful for the production of the propellant. Finally, it is observed that the decreasing of the curing time to the half time brought the same properties of the standard curing time, and then it is concluded that the deceasing of the curing time can be applied safely and usefully in the casting production line.

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