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Samad A, Siew WH, Given M, Liggat J, Timoshkin I. Investigating the Impact of Hardness on Dielectric Breakdown Characteristics of Polyurethane. ACS OMEGA 2024; 9:24538-24545. [PMID: 38882065 PMCID: PMC11171084 DOI: 10.1021/acsomega.4c00509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/04/2024] [Accepted: 05/24/2024] [Indexed: 06/18/2024]
Abstract
Polymeric materials play a vital role in high-voltage insulation, but their insulating properties can deteriorate over time, leading to insulation failures. The presence of voids resulting from manufacturing defects or external stresses can create a highly divergent field, further contributing to this issue. However, certain polymers, such as polyurethane (PU), possess self-healing properties that enable them to repair these voids and restore a uniform electric field distribution, thereby ensuring the reliability of the insulation. Surprisingly, the potential of PU as an insulating material in high-voltage applications remains unexplored. However, the self-healing capability of PU decreases with an increase in the hardness of the material. Therefore, in this study, the dielectric breakdown properties of PU with different levels of hardness, rated on the Shore scale as 40° (soft), 70° (medium), and 90° (hard), were investigated. The AC and DC dielectric breakdown characteristics of these PU variants and dielectric spectra were examined. Additionally, the study explores the relationship between the dielectric properties and the hardness of the material. Our findings revealed that the dielectric breakdown strength of PU increases as the material's hardness is increased under both AC and DC electric stress. However, this may come at the cost of reduced self-healing capabilities of PU. Therefore, there is a need to balance the hardness of the material with its ability to recover from breakdown events. The findings from this study can be useful for researchers and engineers, as they offer valuable insights into the dielectric properties of PU at various hardness levels.
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Affiliation(s)
- Abdul Samad
- Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XQ, U.K
| | - Wah Hoon Siew
- Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XQ, U.K
| | - Martin Given
- Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XQ, U.K
| | - John Liggat
- Department of Pure and Applied Chemistry University of Strathclyde, Glasgow G1 1XQ, U.K
| | - Igor Timoshkin
- Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XQ, U.K
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Bi P, Zhu X, Han J, Tian L, Zhang W. Synthesis and Comparative Study of Polyether- b-polybutadiene- b-polyether Triblock Copolymers for Use as Polyurethanes. Polymers (Basel) 2023; 15:3486. [PMID: 37631543 PMCID: PMC10459386 DOI: 10.3390/polym15163486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/27/2023] Open
Abstract
In this paper, the effects of HTPBs with different main-chain microstructures on their triblock copolymers and polyurethane properties were investigated. Three polyether-modified HTPB triblock copolymers were successfully synthesized via a cationic ring-opening copolymerization reaction using three HTPBs with different microstructures prepared via three different polymerization methods as the macromolecular chain transfer agents and tetrahydrofuran (THF) and propylene oxide (PO) as the copolymerization monomers. Finally, the corresponding polyurethane elastomers were prepared using the three triblock copolymers as soft segments and toluene diisocyanate (TDI) as hard segments. The results of an analysis of the triblock copolymers showed that the triblock copolymers had lower viscosity and glass transition temperature (Tg) values as the HTPB 1,2 structure content decreased, although the effect on the thermal decomposition temperature was not significant. An analysis of the polyurethane elastomers revealed that as the content of the 1,2 structure in HTPB increased, its corresponding polyurethane elastomers showed a gradual increase in breaking strength and a gradual decrease in elongation at break. In addition, PU-1 had stronger crystallization properties compared to PU-2 and PU-3. However, the differences in the microstructures of the HTPBs did not seem to have much effect on the surface properties of the polyurethane elastomers.
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Affiliation(s)
- Pengzhi Bi
- State Key Laboratory of Biobased Material and Green Papermaking, Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China; (P.B.); (J.H.); (L.T.)
- Key Laboratory for Green Leather Manufacture Technology of China National Light Industry Council, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China
| | - Xiuzhong Zhu
- State Key Laboratory of Biobased Material and Green Papermaking, Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China; (P.B.); (J.H.); (L.T.)
- Key Laboratory for Green Leather Manufacture Technology of China National Light Industry Council, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China
- Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry Ministry of Education, Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science and Technology, Xi’an 710021, China;
| | - Jinbang Han
- State Key Laboratory of Biobased Material and Green Papermaking, Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China; (P.B.); (J.H.); (L.T.)
- Key Laboratory for Green Leather Manufacture Technology of China National Light Industry Council, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China
| | - Li Tian
- State Key Laboratory of Biobased Material and Green Papermaking, Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China; (P.B.); (J.H.); (L.T.)
- Key Laboratory for Green Leather Manufacture Technology of China National Light Industry Council, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China
| | - Wanbin Zhang
- Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry Ministry of Education, Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science and Technology, Xi’an 710021, China;
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Saghiri MA, Vakhnovetsky J, Vakhnovetsky A, Samadi E, Samadi F. Volume and power of expansion of novel polyurethane-based sealers. J Endod 2023:S0099-2399(23)00291-1. [PMID: 37276958 DOI: 10.1016/j.joen.2023.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Shrinkage and lack of interfacial adaptation between endodontic sealers and root canal walls may jeopardize the root canal treatment outcome. This study aimed to evaluate the volume and power of expansion (and the relationship between the two) of three novel root canal sealers (polyurethane expandable sealer (PES), zeolite + PES (ZPES), and elastomeric polyurethane sealer (EPS)) in comparison with an epoxy-resin based sealer (AH Plus) and a calcium silicate-based sealer (EndoSequence BC). METHODS This study utilized 36 cylinders (30 plastic graduated cylinders for volume of expansion and 6 steel cylinders for power of expansion) (4x10mm) filled with PES, ZPES, EPS, AH Plus, EndoSequence BC, or water (n=5/group). The plastic graduated cylinders were inserted inside a customized Linear Swell Meter (LSM) apparatus to measure the percentage of volumetric expansion. The steel cylinders were placed inside an LSM apparatus mounted onto a universal testing machine to measure the maximum pressure in psi. Specimens were tested for 72 hours for both volume and power of expansion tests. Data were analyzed using Kolmogorov-Smirnov, one-way ANOVA, Post Hoc Tukey, and Pearson correlation tests (p<0.05). RESULTS The volume of expansion of PES, ZPES, and EPS was significantly higher than in AH Plus and EndoSequence BC (p<0.05). For the power of expansion, no significant differences were found between the root-filling materials (p>0.05). No correlation was seen between the volume and power of expansion (p>0.05). CONCLUSION Although polyurethane-based sealers showed a significantly higher volume of expansion compared to AH Plus and EndoSequence BC, their power of expansion did not increase significantly.
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Affiliation(s)
- Mohammad Ali Saghiri
- Director of Biomaterial and Prosthodontics Laboratory, Assistant Professor, Department of Restorative Dentistry, Rutgers School of Dental Medicine, Newark, NJ, USA; Adjunct Assistant Professor, Department of Endodontics, University of the Pacific, Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA.
| | - Julia Vakhnovetsky
- Clinical Researcher, Sector of Innovation in Dentistry, Dr. Hajar Afsar Lajevardi Research Cluster (DHAL), Hackensack, NJ, USA; Clinical Researcher, Biomaterial and Prosthodontics Laboratory, Rutgers School of Dental Medicine, Newark, NJ, USA
| | - Anna Vakhnovetsky
- Clinical Researcher, Biomaterial and Prosthodontics Laboratory, Rutgers School of Dental Medicine, Newark, NJ, USA; Pre-Med Student, Johns Hopkins University, Baltimore, MD, USA
| | - Elham Samadi
- Clinical Researcher, Sector of Innovation in Dentistry, Dr. Hajar Afsar Lajevardi Research Cluster (DHAL), Hackensack, NJ, USA; Clinical Researcher, Biomaterial and Prosthodontics Laboratory, Rutgers School of Dental Medicine, Newark, NJ, USA
| | - Fatereh Samadi
- Clinical Researcher, Sector of Innovation in Dentistry, Dr. Hajar Afsar Lajevardi Research Cluster (DHAL), Hackensack, NJ, USA; Clinical Researcher, Biomaterial and Prosthodontics Laboratory, Rutgers School of Dental Medicine, Newark, NJ, USA
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Kurapati R, Natarajan U. Role of Chemical Linkage in Solvation of Polyurethanes in Organic Solvents Studied by Explicit Molecular Dynamics Simulations. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Raviteja Kurapati
- Macromolecular Modeling and Simulation Laboratory, Department of Chemical Engineering, Indian Institute of Technology (IIT) Madras, Chennai600036, India
| | - Upendra Natarajan
- Macromolecular Modeling and Simulation Laboratory, Department of Chemical Engineering, Indian Institute of Technology (IIT) Madras, Chennai600036, India
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Li Z, Zhang Y, Yan S, Zhang Y, Liu M, Gong L. Fabrication and characterization of novel polyurethane Encapsulant with excellent underwater acoustic transparency and hydrophobicity. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhihua Li
- School of Materials Science and Engineering Central South University Changsha China
| | - Yidan Zhang
- School of Materials Science and Engineering Central South University Changsha China
| | - Shuxuan Yan
- School of Materials Science and Engineering Central South University Changsha China
| | - Yibo Zhang
- School of Materials Science and Engineering Central South University Changsha China
| | - Mengmei Liu
- School of Materials Science and Engineering Central South University Changsha China
| | - Liangjun Gong
- School of Materials Science and Engineering Central South University Changsha China
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The Effect of Single Curing Agents on the Curing Reactions of the HTPB-based Binder System. COATINGS 2022. [DOI: 10.3390/coatings12081090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
As the hydroxyl-terminated polybutadiene (HTPB)-based binder system is widely applied in many industries, the curing process plays an important role in the final properties of the resulting product containing such a binder system. This study used a viscometer to measure viscosity buildup in the curing process of the binder system with various curing agents under isothermal conditions. Key parameters such as rheological reaction rate constant (kƞ) and pot life of different were measured and calculated. The rheological reaction rate constants of the HTPB-based binder systems included 0.0423 min−1 (MDI), 0.0049 min−1 (HDI-trimer) and 0.0014 min−1 (HMDI). The pot lives of the HTPB-MDI, HTPB-TDI, and HTPB-HDI-trimer were 0.6 h, 3.6 h and 8.1 h, respectively. One interesting finding is that HTPB-HDI-trimer binder, which had the long pot life, exhibited an accelerated trend in the viscosity buildup in the late phase. This feature is of great significance to improving the final properties of the products generated in propellant manufacturing and other fields. The cause of this phenomenon and the curing process of HTPB-HDI-trimer binder system were analyzed and discussed in the present study.
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Cui Y, Xu Z, Li Y, Lang X, Zong C, Cao L. Synergistic thermodynamic compatibility of polydimethylsiloxane block in thermoplastic polyurethane for flame retardant materials: Super flexible, highly flame retardant and low smoke release. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124976] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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8
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Quagliano Amado JC, Ross PG, Mattos Silva Murakami L, Narciso Dutra JC. Properties of Hydroxyl‐Terminal Polybutadiene (HTPB) and Its Use as a Liner and Binder for Composite Propellants: A Review of Recent Advances. PROPELLANTS EXPLOSIVES PYROTECHNICS 2022. [DOI: 10.1002/prep.202100283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Javier Carlos Quagliano Amado
- Applied Chemistry Department Institute for Scientific and Technical Research for the Defense (CITEDEF) Ave. JB de La Salle 4397 B1603ALO Buenos Aires Argentina
| | - Pablo Germán Ross
- Applied Chemistry Department Institute for Scientific and Technical Research for the Defense (CITEDEF) Ave. JB de La Salle 4397 B1603ALO Buenos Aires Argentina
| | - Lidia Mattos Silva Murakami
- InstitutoTecnológico de Aeronáutica (ITA) Praça Marechal Eduardo Gomes 50, Vila das Acácias CEP 12228-900 São José dos Campos, SP Brazil
| | - Jorge Carlos Narciso Dutra
- InstitutoTecnológico de Aeronáutica (ITA) Praça Marechal Eduardo Gomes 50, Vila das Acácias CEP 12228-900 São José dos Campos, SP Brazil
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Ganivada MN, Dhara M, Jana S, Jana T. Synthetic routes to modify hydroxyl terminated polybutadiene for various potential applications. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.2013730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mutyala Naidu Ganivada
- Advanced Centre of Research in High Energy Materials, University of Hyderabad, Hyderabad, India
| | - Moumita Dhara
- School of Chemistry, University of Hyderabad, Hyderabad, India
| | - Sourav Jana
- Advanced Centre of Research in High Energy Materials, University of Hyderabad, Hyderabad, India
| | - Tushar Jana
- Advanced Centre of Research in High Energy Materials, University of Hyderabad, Hyderabad, India
- School of Chemistry, University of Hyderabad, Hyderabad, India
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11
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Cui Y, Wang H, Pan H, Yan T, Zong C. The effect of mixed soft segment on the microstructure of thermoplastic polyurethane. J Appl Polym Sci 2021. [DOI: 10.1002/app.51346] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yongyin Cui
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
| | - Hairui Wang
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
| | - Hongwei Pan
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
| | - Tongtong Yan
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
| | - Chengzhong Zong
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
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Liu Y, Zheng J, Zhang X, Du Y, Yu G, Li K, Jia Y, Zhang Y. Bioinspired modified graphene oxide/polyurethane composites with rapid self-healing performance and excellent mechanical properties. RSC Adv 2021; 11:14665-14677. [PMID: 35423966 PMCID: PMC8698205 DOI: 10.1039/d1ra00944c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/02/2021] [Indexed: 11/28/2022] Open
Abstract
Self-healing efficiency and mechanical strength are always a pair of mechanical contradictions of a polymer. Herein, a series of novel mussel-inspired modified graphene oxide/polyurethane composites were successfully fabricated via rational molecular design and introducing hyperbranched polymer-modified graphene oxide. The composites exhibit outstanding self-healing performances with a self-healing efficiency of 87.9%. Especially, their self-healing properties possess exceptional water-insensitivity, which presents a high self-healing efficiency of 92.5% under 60 °C water for 2 h and 74.6% under 25 °C water for 6 h. Furthermore, the tensile strength of the composites increased by 107.7% with a high strain of 2170%. In addition, the composites show a remarkable recovery capability of 76.3% and 83.7% under tensile and compression loading, respectively, after 20 cycles. This strategy shows prominent application potential in high-performance solid propellants, protective coating, electronic skin, soft sensors and other water-insensitive devices. We successfully modified graphene oxide with amino-terminated hyperbranched polyamide(MGO), and obtained novel mussel-inspired MGO/polyurethane composites with outstanding self-healing and mechanical performances via rational molecular design.![]()
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Affiliation(s)
- Yahao Liu
- Shijiazhuang Campus, Army Engineering University Shijiazhuang 050003 China
| | - Jian Zheng
- Shijiazhuang Campus, Army Engineering University Shijiazhuang 050003 China
| | - Xiao Zhang
- Engineering University of PAP Xi'an 710086 China
| | - Yongqiang Du
- Shijiazhuang Campus, Army Engineering University Shijiazhuang 050003 China
| | - Guibo Yu
- Shijiazhuang Campus, Army Engineering University Shijiazhuang 050003 China
| | - Ke Li
- College of Naval Architecture and Ocean Engineering, Naval University of Engineering Wuhan 430033 China
| | - Yunfei Jia
- Shijiazhuang Campus, Army Engineering University Shijiazhuang 050003 China
| | - Yu Zhang
- Shijiazhuang Campus, Army Engineering University Shijiazhuang 050003 China
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Mussel-inspired and aromatic disulfide-mediated polyurea-urethane with rapid self-healing performance and water-resistance. J Colloid Interface Sci 2021; 593:105-115. [PMID: 33744521 DOI: 10.1016/j.jcis.2021.03.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/19/2021] [Accepted: 03/01/2021] [Indexed: 11/21/2022]
Abstract
Although lots of methods have been developed for self-healing materials, it remains a formidable challenge to achieve a thermosetting material with water-insensitive and self-healing properties at room temperature. Nature always provides intelligent strategies for developing advanced materials with superior properties. Herein, a novel self-healable polyurea-urethane was rationally designed by combining mussel adhesive protein-mimetic structure and dynamic aromatic disulfide bonds. It achieves high self-healing efficiency of 98.4% at room temperature for only 6 h and 90% at 60℃ for only 30 min without any external stimuli. Impressively, this self-healing capability possesses exceptional water-resistance, which presents high self-healing efficiency of 98.1% for 2 h and 82.1% for 6 h in 60℃ and 25℃ water, respectively. Besides, the designed polyurea-urethane exhibits excellent mechanical properties such as high elongation at break of 2400%, notch-insensitive stretching elongation of 1500% and notable recovery capability. This strategy shows promising application potential in solid propellants, protective coating, electronic skin, soft sensors and other water-resistant devices.
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Lemos MF, Mendes LC, Bohn MA. On the functionalization and characterization of hydroxyl‐terminated polybutadiene with octyl‐1‐azide and the evaluation of polyurethane elastomers based on such modified HTPB. J Appl Polym Sci 2021. [DOI: 10.1002/app.49981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mauricio Ferrapontoff Lemos
- Group of Materials Technology Instituto de Pesquisas da Marinha (IPqM) Rio de Janeiro RJ Brazil
- Instituto de Macromoleculas Professora Eloisa Mano Universidade Federal do Rio de Janeiro Rio de Janeiro RJ Brazil
| | - Luis Claudio Mendes
- Instituto de Macromoleculas Professora Eloisa Mano Universidade Federal do Rio de Janeiro Rio de Janeiro RJ Brazil
| | - Manfred A. Bohn
- Department of Energetic Materials Fraunhofer Institute for Chemical Technology ICT Pfinztal Germany
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Dhara M, Giri N, Dutta A, Patra A, Sastry P, Ingole MS, Jana T. Enhancing segmental compatibility and tuning the structure-property relationship in ferrocenylsilane tethered polyurethane. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122807] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Rusu LC, Ardelean LC, Jitariu AA, Miu CA, Streian CG. An Insight into the Structural Diversity and Clinical Applicability of Polyurethanes in Biomedicine. Polymers (Basel) 2020; 12:polym12051197. [PMID: 32456335 PMCID: PMC7285236 DOI: 10.3390/polym12051197] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/13/2020] [Accepted: 05/22/2020] [Indexed: 01/16/2023] Open
Abstract
Due to their mechanical properties, ranging from flexible to hard materials, polyurethanes (PUs) have been widely used in many industrial and biomedical applications. PUs’ characteristics, along with their biocompatibility, make them successful biomaterials for short and medium-duration applications. The morphology of PUs includes two structural phases: hard and soft segments. Their high mechanical resistance featuresare determined by the hard segment, while the elastomeric behaviour is established by the soft segment. The most important biomedical applications of PUs include antibacterial surfaces and catheters, blood oxygenators, dialysis devices, stents, cardiac valves, vascular prostheses, bioadhesives/surgical dressings/pressure-sensitive adhesives, drug delivery systems, tissue engineering scaffolds and electrospinning, nerve generation, pacemaker lead insulation and coatings for breast implants. The diversity of polyurethane properties, due to the ease of bulk and surface modification, plays a vital role in their applications.
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Affiliation(s)
- Laura-Cristina Rusu
- Department of Oral Pathology, “Victor Babes” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu sq, 300041 Timisoara, Romania;
| | - Lavinia Cosmina Ardelean
- Department of Technology of Materials and Devices in Dental Medicine, “Victor Babes” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu sq, 300041 Timisoara, Romania
- Correspondence:
| | - Adriana-Andreea Jitariu
- Department of Microscopic Morphology/Histology and Angiogenesis Research Center Timisoara, “Victor Babes” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu sq, 300041 Timisoara, Romania;
| | - Catalin Adrian Miu
- 3rd Department of Orthopaedics-Traumatology, “Victor Babes” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu sq, 300041 Timisoara, Romania;
| | - Caius Glad Streian
- Department of Cardiac Surgery, “Victor Babes” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu sq, 300041 Timisoara, Romania;
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Dhara M, Giri N, Narasimha Rao B, Patra A, Sastry P, Ingole MS, Jana T. Effect of segmental compatibility imposed over metal based polybutadiene polyurethane. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109380] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zhang Y, Wang J, Fang X, Liao J, Zhou X, Zhou S, Bai F, Peng S. High solid content production of environmentally benign ultra-thin lignin-based polyurethane films: Plasticization and degradation. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121572] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Rao BN, Sastry P, Jana T. Structure-property relationships of ferrocene functionalized segmented polyurethane. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.03.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ferrocene grafted hydroxyl terminated polybutadiene: A binder for propellant with improved burn rate. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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