scholarly journals Development of Interfacial Adhesive Property by Novel Anti-Stripping Composite between Acidic Aggregate and Asphalt

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 473
Author(s):  
Guohong Zhang ◽  
Jianhui Qiu ◽  
Jingzhuo Zhao ◽  
Dingbang Wei ◽  
Hui Wang
Keyword(s):  
Thermal Stability ◽  
Interfacial Adhesion ◽  
Moisture Damage ◽  
Decomposition Temperature ◽  
Social Significance ◽  
Excellent Thermal Stability ◽  
Adhesion Properties ◽  
Stability Performance ◽  
The Poor ◽  
Damage Process

Studies on control of and preventive measures against asphalt pavement moisture damage have important economic and social significance due to the multiple damage and repair of pavements, the reasons for which include the poor interfacial adhesive ability between acidic aggregates and asphalts. Anti-stripping agent is used in order to improve the poor adhesion, and decomposition temperature is regarded as being important for lots of anti-stripping products, because they always decompose and lose their abilities under the high temperature in the mixing plant before application to the pavement. A novel anti-stripping composite, montmorillonoid/Polyamide (OMMT/PAR), which possesses excellent thermal stability performance and is effective in preventing moisture damage, especially for acidic aggregates, was prepared. Moreover, the modification mechanisms and pavement properties were also investigated with reference to the composites. The results show that OMMT/PAR was prepared successfully, improving the interfacial adhesion between the acidic aggregate and the modified asphalt. Due to the nanostructure of OMMT/PAR, the thermal stability was enhanced dramatically and the interfacial adhesion properties were also improved. Furthermore, asphalts modified with OMMT/PAR and their mixtures showed excellent properties. Finally, the moisture damage process and the mechanisms by which OMMT/PAR improves the interfacial adhesion properties are explained through adhesion mechanism analyses.

scholarly journals Taming nitroformate through encapsulation with nitrogen-rich hydrogen-bonded organic frameworks

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jichuan Zhang ◽  
Yongan Feng ◽  
Richard J. Staples ◽  
Jiaheng Zhang ◽  
Jean’ne M. Shreeve
Keyword(s):  
Thermal Stability ◽  
Hydrogen Bonds ◽  
Self Assembly ◽  
Energetic Materials ◽  
Decomposition Temperature ◽  
High Oxygen Content ◽  
The Poor ◽  
Simple Preparation ◽  
First Time ◽  
Hydrogen Bonded

AbstractOwing to its simple preparation and high oxygen content, nitroformate [−C(NO2)3, NF] is an extremely attractive oxidant component for propellants and explosives. However, the poor thermostability of NF-based derivatives has been an unconquerable barrier for more than 150 years, thus hindering its application. In this study, the first example of a nitrogen-rich hydrogen-bonded organic framework (HOF-NF) is designed and constructed through self-assembly in energetic materials, in which NF anions are trapped in pores of the resulting framework via the dual force of ionic and hydrogen bonds from the strengthened framework. These factors lead to the decomposition temperature of the resulting HOF-NF moiety being 200 °C, which exceeds the challenge of thermal stability over 180 °C for the first time among NF-based compounds. A large number of NF-based compounds with high stabilities and excellent properties can be designed and synthesized on the basis of this work.

The Structure and Properties of HDPE/EAA-Hydrotalcite Master Batch Nanocomposites

2012 ◽  
Vol 450-451 ◽  
pp. 715-718 ◽  
Author(s):  
Jun Qin ◽  
Huan Zhang ◽  
Li Ping Chen ◽  
Jie Yu
Keyword(s):  
Thermal Stability ◽  
High Density Polyethylene ◽  
Interfacial Adhesion ◽  
Decomposition Temperature ◽  
Melt Blending ◽  
Structure And Properties ◽  
The Matrix ◽  
Onset Decomposition Temperature ◽  
Double Hydroxide ◽  
Master Batch

The High-density polyethylene (HDPE) / the ethylene acrylic acid (EAA) - layered double hydroxide (LDH) nanocomposites were prepared by melt blending with EAA)/ LDH master batch; and the structure and properties of this nanocomposite were studied. The results showed that the EAA acted as an effective compatibilizer for the nanocomposites can enhance the interfacial adhesion between LDH and HDPE obviously, promote the dispersion of LDH in the matrix, increase both the tensile strength and toughness of nanocomposites, and improve the thermal stability and delay the onset decomposition temperature of nanocomposites.

Research on Preparation, Properties and UV Curing Behaviors of Novel Myrcene-Based Vinyl Ester Resin

2013 ◽  
Vol 807-809 ◽  
pp. 2826-2830 ◽  
Author(s):  
Xue Juan Yang ◽  
Shou Hai Li ◽  
Xiao Dong Tang ◽  
Jian Ling Xia
Keyword(s):  
Thermal Stability ◽  
Vinyl Ester ◽  
Impact Resistance ◽  
Uv Curing ◽  
High Hardness ◽  
Decomposition Temperature ◽  
Ftir Analysis ◽  
Vinyl Ester Resin ◽  
Initial Decomposition Temperature ◽  
Excellent Thermal Stability

Myrcene-based vinyl ester resin (VER) monomer was prepared via simple Diels-Alder reaction and ring-opening esterification. The molecular structure and UV curing behaviors of prepared VER monomer were characterized using FTIR analysis method. Moreover, the mechanical properties, thermal stability and hardness of its UV cured product were also investigated. FTIR analysis results demonstrated that the target myrcene-based VER monomer has been successfully synthesized. UV curing behaviors analysis showed that prepared myrcene-based VER monomer could reach ultimate cured level within 50 s. Physical properties study showed that the UV cured product has certain tensile, flexural, impact resistance properties and high hardness. TGA indicated the UV cured product had excellent thermal stability, as it showed high thermal initial decomposition temperature at 359.6 °C .

Preparation and thermal stability of heat-resistant phenolic resin system constructed by multiple heat-resistant compositions containing boron and silicon

2016 ◽  
Vol 29 (4) ◽  
pp. 493-498 ◽  
Author(s):  
Fengyi Wang ◽  
Zhixiong Huang ◽  
Guangwu Zhang ◽  
Yunxia Li
Keyword(s):  
Thermal Stability ◽  
Phenol Formaldehyde ◽  
Interlayer Spacing ◽  
Decomposition Temperature ◽  
Char Yield ◽  
X Ray Diffraction ◽  
Excellent Thermal Stability ◽  
Heat Resistant ◽  
Graphite Structure ◽  
Thermal Stability Of

This work reports a boron- and silicon-containing phenolic-formaldehyde (PF) resin exhibiting an extremely high thermal decomposition temperature and char yield and formed by copolymerizing phenol, formaldehyde, boric acid (BA), and phenyltriethoxysilane (PTES). The structure of BA and PTES-modified PF (BSPF) resin was characterized by Fourier transform infrared spectroscopy. Thermal stability of the investigated composites was estimated by means of thermogravimetric analysis (TGA). The results of TGA indicated that the modified resin exhibited excellent thermal stability. Specifically, the thermoset had a char yield of 77.0% when the boron and silicon contents were only 1.27 wt% and 1.7 wt%, respectively. Compared with the unmodified resin (PF), the temperature at the maximum decomposing rate of the BSPF increased by 84°C and its charring yield was enhanced by 15.0%. The cured products of PF and BSPF were further investigated by X-ray diffraction and Raman spectroscopy, respectively. The incorporation of boron and silicon into the carbon lattice results in a decrease of interlayer spacing, and Raman ID/ IG values for PF and BSPF (2.63 and 1.32) show that the rearrangement of crystalline structure leads to an increase in graphite structure and a decrease in disordered structure upon the modification processes.

Research on the preparation of heat-resistant epoxy resin cured by o-carborane-based diamine

2017 ◽  
Vol 30 (9) ◽  
pp. 1094-1100 ◽  
Author(s):  
Zhao Juan ◽  
Qing Ning ◽  
Jiang Shaohua ◽  
Wu Suping
Keyword(s):  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Thermogravimetric Analysis ◽  
Epoxy Resin ◽  
Decomposition Temperature ◽  
Scanning Calorimetry ◽  
Initial Decomposition Temperature ◽  
Excellent Thermal Stability ◽  
Thermal Oxidative Stability ◽  
Air Atmosphere

A novel carborane-containing epoxy resin was prepared via the curing reaction between epoxy resin (E51) and 1,2-bis(4-aminophthalimide)dimethyl-1,2-dicarba-closododecaborane (4-AP CBR). According to the nonisothermal differential scanning calorimetry method and the T-β extrapolation method, the curing temperatures of the 4-AP CBR/E51 system were theoretically determined. The cured carboranyl epoxy resin was analyzed by thermogravimetric analysis (TGA), which revealed that the resin had excellent thermal stability and thermal oxidative stability. The results of TGA indicated that the initial decomposition temperature of the resin was exceeding 400°C and the char yield at 800°C was around 60% both under nitrogen and in air atmosphere.

Highly transparent and flexible polyimide–AgNW hybrid electrodes with excellent thermal stability for electrochromic applications and defogging devices

2015 ◽  
Vol 3 (15) ◽  
pp. 3629-3635 ◽  
Author(s):  
Heng-Yi Lu ◽  
Chin-Yen Chou ◽  
Jia-Hao Wu ◽  
Jiang-Jen Lin ◽  
Guey-Sheng Liou
Keyword(s):  
Thermal Stability ◽  
Transparent Electrode ◽  
Excellent Thermal Stability ◽  
Adhesion Properties

By introducing colorless polyimide as a binder, an AgNW transparent electrode exhibited excellent thermal stability, bendability, and adhesion properties.

scholarly journals Closed-Cell Rigid Polyimide Foams for High-Temperature Applications: The Effect of Structure on Combined Properties

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4434
Author(s):  
Yawei Shi ◽  
Aijun Hu ◽  
Zhiyuan Wang ◽  
Kedi Li ◽  
Shiyong Yang
Keyword(s):  
Thermal Stability ◽  
Decomposition Temperature ◽  
Precursor Powder ◽  
Diethyl Ester ◽  
Aromatic Diamine ◽  
Excellent Thermal Stability ◽  
Compression Creep ◽  
Closed Cell ◽  
End Capping ◽  
Tetracarboxylic Dianhydride

Closed-cell rigid polyimide foams with excellent thermal stability and combined properties were prepared by thermal foaming of a reactive end-capped polyimide precursor powder in a closed mold. The precursor powder was obtained by thermal treatment of a polyester-amine salt (PEAS) solution derived from the reaction of the diethyl ester of 2,3,3′,4′-biphenyl tetracarboxylic dianhydride (α-BPDE) with an aromatic diamine mixture of p-phenylenediamine (PDA) and 2-(4-aminophenyl)-5-aminobenzimidazole (BIA) in the presence of an end-capping agent (mono-ethyl ester of nadic acid anhydride, NE) in an aliphatic alcohol. The effect of polymer mainchain structures on the foaming processability and combined properties of the closed-cell rigid polyimide foams were systematically investigated. The polyimide foams (100–300 kg/m3) with closed-cell rates of 91–95% show an outstanding thermal stability with an initial thermal decomposition temperature of ≥490 °C and a glass transition temperature of 395 °C. Polyimide foams with density of 250 kg/m3 exhibited compression creep deformation as low as 1.6% after thermal aging at 320 °C/0.4 MPa for 2 h.

Olefin Metathesis–Based Chemically Recyclable Polymers Enabled by a Fused-Ring Monomer

2020 ◽  
Author(s):  
Junpeng Wang ◽  
Devavrat Sathe ◽  
Junfeng Zhou ◽  
Hanlin Chen ◽  
Hsin-Wei Su ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Ring Opening ◽  
Strain Energy ◽  
Decomposition Temperature ◽  
Excellent Thermal Stability ◽  
Fused Ring ◽  
Promising Solution ◽  
Sustainable Materials ◽  
Tunable Mechanical Properties

Abstract A promising solution to address the challenges in plastics sustainability is to replace current polymers with chemically recyclable ones that can depolymerise into their constituent monomers for circular use of materials. Despite the progress, few depolymerisable polymers exhibit the excellent thermal stability and strong mechanical properties of traditional polymers. Here we report a series of chemically recyclable polymers that show excellent thermal stability (decomposition temperature > 370 ºC) and tunable mechanical properties. The polymers are formed via ring-opening metathesis polymerisation of cyclooctene with a trans-cyclobutane installed at the 5,6-positions. The additional ring converts the non-depolymerisable polycyclooctene into a depolymerisable polymer by reducing the ring strain energy in the monomer (from 8.2 kcal/mol in unsubstituted cyclooctene to 4.9 kcal/mol in the fused ring). The fused-ring monomer enables a broad scope of functionalities to be incorporated, providing access to chemically recyclable elastomers and plastics that show promise as next-generation sustainable materials.

Construction of flexible 1D core-shell Al2O3@NaNbO3 nanowires/poly-(p-phenylene benzobisoxazole) nanocomposite with stable and enhanced dielectric properties in an ultra-wide temperature range

2021 ◽  
Author(s):  
Jinpeng Li ◽  
Junhao Jiang ◽  
Qilin Cheng ◽  
Zhong-Kai Cui ◽  
Xiaoyun Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Dielectric Properties ◽  
Wide Temperature Range ◽  
Core Shell ◽  
Critical Importance ◽  
Excellent Thermal Stability ◽  
Temperature Range ◽  
The Poor ◽  
Polymeric Dielectrics

Polymeric dielectrics with high-temperature resilience are of critical importance in developing advanced electrostatic capacitors. Poly-(p-phenylene benzobisoxazole) (PBO) is a polymer with excellent thermal stability. However, the poor processability and low...

scholarly journals IgY antibodies against Ebola virus possess post-exposure protection and excellent thermostability

2020 ◽  
Author(s):  
Yuan Zhang ◽  
Yanqiu Wei ◽  
Yunlong Li ◽  
Xuan Wang ◽  
Yang Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ebola Virus ◽  
Lethal Dose ◽  
Therapeutic Antibody ◽  
Complete Protection ◽  
Immunoglobulin Y ◽  
Excellent Thermal Stability ◽  
The Poor ◽  
One Year ◽  
Thermal Stability Of

AbstractEbola virus (EBOV) is the most virulent pathogens that cause hemorrhagic fever with high mortality rates in humans and nonhuman primates. The postexposure antibody therapies to prevent EBOV infection are considered efficient. However, due to the poor thermal stability of mammalian antibody, their application in the tropics has been limited. Here, we developed a thermostable therapeutic antibody against EBOV based on chicken immunoglobulin Y (IgY). The IgY antibodies demonstrated excellent thermal stability, which retained their neutralizing activity at 25°C for one year, in contrast to conventional polyclonal or monoclonal antibodies (MAbs). We immunized laying hens with a variety of EBOV vaccine candidates and confirmed that VSV Δ G/EBOVGP encoding the EBOV glycoprotein could induce high titer neutralizing antibodies against EBOV. The therapeutic efficacy of immune IgY antibodies in vivo was evaluated in the newborn Balb/c mice model. Lethal dose of virus challenged mice were treated 2 or 24 h post-infection with different doses of anti-EBOV IgY. The group receiving a high dose of 106 NAU/kg (neutralizing antibody units/kilogram) achieved complete protection with no signs of disease, while the low-dose group was only partially protected. In contrast, all mice receiving naïve IgY died within 10 days. In conclusion, the anti-EBOV IgY exhibits excellent thermostability and protective efficacy, and it is very promising to be developed as alternative therapeutic entities.Author SummaryAlthough several Ebola virus therapeutic antibodies have been reported in recent years, however, due to the poor thermal stability of mammalian antibody, their application in tropical endemic areas has been limited. We developed a highly thermostable therapeutic antibody against EBOV based on chicken immunoglobulin Y (IgY). The IgY antibodies demonstrated excellent thermal stability, which retained their neutralizing activity at 25°C for one year. The newborn mice receiving passive transfer of IgY achieved complete protection against a lethal dose of virus challenge indicating that the anti-EBOV IgY provides a promising countermeasure to solve the current clinical application problems of Ebola antibody-based treatments in Africa.

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