Energetic interpenetrating polymer network based on orthogonal azido–alkyne click and polyurethane for potential solid propellant

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64478-64485 ◽  
Author(s):  
Abbas Tanver ◽  
Mu-Hua Huang ◽  
Yunjun Luo ◽  
Syed Khalid ◽  
Tariq Hussain
Keyword(s):  
Low Temperature ◽  
Mechanical Strength ◽  
Solid Propellant ◽  
Polymer Network ◽  
Aerospace Industry ◽  
Interpenetrating Polymer Network ◽  
Glycidyl Azide Polymer ◽  
Energetic Polymer ◽  
Glycidyl Azide

High energetic propellants with synergistic mechanical strength are the prerequisites for aerospace industry and missile technology; though glycidyl azide polymer (GAP) is a renowned and a promising energetic polymer which shows poor mechanical and low-temperature properties.

scholarly journals The Effect of Glycidyl Azide Polymer Grafted Tetrafunctional Isocyanate on Polytriazole Polyethylene Oxide-Tetrahydrofuran Elastomer and its Propellant Properties

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 278 ◽  
Author(s):  
Jinghui Hu ◽  
Weiqiang Tang ◽  
Yonghui Li ◽  
Jiyu He ◽  
Xiaoyan Guo ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Polyethylene Oxide ◽  
Mechanical Test ◽  
Glycidyl Azide Polymer ◽  
Interface Interaction ◽  
Ft Ir ◽  
Glycidyl Azide

A new energetic curing reagent, Glycidyl azide polymer grafted tetrafunctional isocyanate (N100-g-GAP) was synthesized and characterized by FT-IR and GPC approaches. Polytriazole polyethylene oxide-tetrahydrofuran (PTPET) elastomer was prepared by N100-g-GAP and alkynyl terminated polyethylene oxide-tetrahydrofuran (ATPET). The resulting PTPET elastomer was fully characterized by TGA, DMA, FTIR and mechanical test. The above analysis indicates that PTPET elastomers using N100-g-GAP as curing reagent have the potential for use in propellants. The overall formulation test of the composite propellants shows that this curing system can effectively enhance mechanical strength and bring a significant improvement in the interface interaction between the RDX & AP particles and binder matrix.

scholarly journals pH-Responsive Succinoglycan-Carboxymethyl Cellulose Hydrogels with Highly Improved Mechanical Strength for Controlled Drug Delivery Systems

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3197
Author(s):  
Younghyun Shin ◽  
Dajung Kim ◽  
Yiluo Hu ◽  
Yohan Kim ◽  
In Ki Hong ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Mechanical Strength ◽  
Carboxymethyl Cellulose ◽  
Polymer Network ◽  
Controlled Drug Release ◽  
Interpenetrating Polymer Network ◽  
Ph Responsive ◽  
Hek 293 ◽  
Natural Polysaccharide ◽  
293 Cells

Carboxymethyl cellulose (CMC)-based hydrogels are generally superabsorbent and biocompatible, but their low mechanical strength limits their application. To overcome these drawbacks, we used bacterial succinoglycan (SG), a biocompatible natural polysaccharide, as a double crosslinking strategy to produce novel interpenetrating polymer network (IPN) hydrogels in a non-bead form. These new SG/CMC-based IPN hydrogels significantly increased the mechanical strength while maintaining the characteristic superabsorbent property of CMC-based hydrogels. The SG/CMC gels exhibited an 8.5-fold improvement in compressive stress and up to a 6.5-fold higher storage modulus (G′) at the same strain compared to the CMC alone gels. Furthermore, SG/CMC gels not only showed pH-controlled drug release for 5-fluorouracil but also did not show any cytotoxicity to HEK-293 cells. This suggests that SG/CMC hydrogels could be used as future biomedical biomaterials for drug delivery.

Energetic hybrid polymer network (EHPN) through facile sequential polyurethane curation based on the reactivity differences between glycidyl azide polymer and hydroxyl terminated polybutadiene

RSC Advances ◽  
2016 ◽  
Vol 6 (13) ◽  
pp. 11032-11039 ◽  
Author(s):  
Abbas Tanver ◽  
Fida Rehman ◽  
Aisha Wazir ◽  
Syed Khalid ◽  
Song Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polymer Network ◽  
Hybrid Polymer ◽  
Glycidyl Azide Polymer ◽  
Glycidyl Azide

To improve the thermo-mechanical properties of glycidyl azide polymer and hydroxyl terminated polybutadiene based propellants, a facile sequential polymerization approach was used to prepare an energetic hybrid polymer network by stepwise curation.

scholarly journals Marine Biomaterial-Based Bioinks for Generating 3D Printed Tissue Constructs

Marine Drugs ◽  
2018 ◽  
Vol 16 (12) ◽  
pp. 484 ◽  
Author(s):  
Xiaowei Zhang ◽  
Gyeong Kim ◽  
Min Kang ◽  
Jung Lee ◽  
Jeong Seo ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Mechanical Strength ◽  
Physical Properties ◽  
Degradation Rate ◽  
Polymer Network ◽  
Three Dimensional ◽  
Pharmaceutical Products ◽  
Biologically Active ◽  
Interpenetrating Polymer Network ◽  
Biomedical Fields

Biologically active materials from marine sources have been receiving increasing attention as they are free from the transmissible diseases and religious restrictions associated with the use of mammalian resources. Among various other biomaterials from marine sources, alginate and fish gelatin (f-gelatin), with their inherent bioactivity and physicochemical tunability, have been studied extensively and applied in various biomedical fields such as regenerative medicine, tissue engineering, and pharmaceutical products. In this study, by using alginate and f-gelatin’s chemical derivatives, we developed a marine-based interpenetrating polymer network (IPN) hydrogel consisting of alginate and f-gelatin methacryloyl (f-GelMA) networks via physical and chemical crosslinking methods, respectively. We then evaluated their physical properties (mechanical strength, swelling degree, and degradation rate) and cell behavior in hydrogels. Our results showed that the alginate/f-GelMA hydrogel displayed unique physical properties compared to when alginate and f-GelMA were used separately. These properties included high mechanical strength, low swelling and degradation rate, and an increase in cell adhesive ability. Moreover, for the first time, we introduced and optimized the application of alginate/f-GelMA hydrogel in a three-dimensional (3D) bioprinting system with high cell viability, which breaks the restriction of their utilization in tissue engineering applications and suggests that alginate/f-GelMA can be utilized as a novel bioink to broaden the uses of marine products in biomedical fields.

Glycidyl Azide Polymer-Based Polyurethane Vitrimers with Disulfide Chain Extenders

2021 ◽  
Author(s):  
Yaofang Hu ◽  
Gang Tang ◽  
Yunjun Luo ◽  
Shumeng Chi ◽  
Xiaoyu Li
Keyword(s):  
Solid Propellants ◽  
Next Generation ◽  
Glycidyl Azide Polymer ◽  
Promising Candidate ◽  
Important Type ◽  
Polymeric Binders ◽  
Chain Extenders ◽  
Energetic Polymer ◽  
Glycidyl Azide

Glycidyl azide polymer (GAP) is an important type of energetic polymer and considered to be the most promising candidate for the polymeric binders for next generation of solid propellants. However,...

The Effect of Cellulose Nanofibres on Mechanical Properties and Bioactivity of Natural Polymers

2013 ◽  
Vol 1498 ◽  
pp. 85-89
Author(s):  
Ali Negahi Shirazi ◽  
Ali Fathi ◽  
Fariba Dehghani
Keyword(s):  
Mechanical Properties ◽  
Cell Growth ◽  
Mechanical Strength ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Nano Particles ◽  
Osteosarcoma Cell ◽  
Natural Polymers ◽  
Cellulose Nanofibres

ABSTRACTNatural polymers, used for hydrogel fabrication, are generally bioactive and provide good environment for cell growth and proliferation. However, these polymers have low mechanical strength. Several approaches have been attempted to improve their mechanical properties such as fabrication of interpenetrating polymer network (IPN) and semi-IPN hydrogels, and also addition of a nano sized fibers or nano-particles. The aim of this study was to investigate the feasibility of using naturally derived nano-fillers such as cellulose nanocrystallines to enhance the mechanical properties of hydrogels. Gelatin methacrylate (GelMA) was used as a protein model for preparation of photo-crosslinked hydrogel. The effects of concentrations of photo initiator and cellulose nanocrystallines (CNC) on the characteristics of hydrogels were examined. In vitro studies showed negligible cytotoxic effect of CNC on human osteosarcoma cell growth when using less than 20 mg/ml CNC. Therefore, it is viable to use this nano-filler for biomedical applications. It was found that the compression modulus of gelatin hydrogel was increased 1.5 fold by addition of 10 mg/ml of CNC. These results demonstrate the high potential of using CNC for tissue engineering applications to enhance the mechanical strength of hydrogels.

Sign in / Sign up

Export Citation Format

Share Document