scholarly journals Research on Resin Used for Impregnating Polyimide Fiber Paper-Based Composite Materials

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4909
Author(s):  
Wenlong Pang ◽  
Ruisen Shi ◽  
Jun Wang ◽  
Qingwei Ping ◽  
Xueru Sheng ◽  
...  
Keyword(s):  
Composite Material ◽  
High Temperature ◽  
Epoxy Resin ◽  
Temperature Stability ◽  
Silicone Resin ◽  
High Temperature Stability ◽  
Temperature Resistance ◽  
High Temperature Resistance ◽  
Polyimide Fiber ◽  
Modified Epoxy

In this paper, a resin with high adhesion, easy curing, good flexibility, and high temperature resistance was prepared from polyimide fiber paper. First, in order to improve the toughness and curability of impregnating resin, epoxy resin was modified by addition of vinyl silicone resin. Subsequently, ternary resin with high temperature stability was obtained by polyimide resin addition. Among the investigated conditions, the optimal additive amount of vinyl silicone resin and polyimide resin was 30% and 5%, respectively. The prepared ternary resin has better toughness, crosslinking degree, high temperature stability (5% mass loss at 339.2 °C) and no obvious glass transition at high temperature. Finally, the polyimide fiber paper-based composite material was impregnated with modified epoxy resin and ternary resin, respectively. The results shows that the paper-based composite material impregnated with modified epoxy resin has a better fiber bonding degree, a smooth surface, and contact angle could reach up to 148.71°. Meanwhile, the paper-based composite material impregnated with ternary resin has good high temperature resistance, and the tensile index of the paper-based composite material could reach up to 35.1 N·m/g at 200 °C.

scholarly journals High Boron Content and Soluble Polyborosilazanes to Amorphous SiBCN Ceramics

2020 ◽  
Author(s):  
Qingqing Chen ◽  
Dechang Jia ◽  
Xingqi Liao ◽  
Zhihua Yang ◽  
Yu Zhou ◽  
...  
Keyword(s):  
High Temperature ◽  
High Performance ◽  
Boron Content ◽  
Synthesis Method ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
One Pot ◽  
Temperature Resistance ◽  
High Boron ◽  
Ft Ir

Abstract To increase the content of boron in soluble polyborosilazanes (PBSZs) (the Si/B ratio should be less than 3), we introduce a successful one-pot synthesis method of a precursor by reaction with tris(dichloromethylsilylethyl)borane (TDSB), boron trichloride (BTC) and hexamethyldisilazane (HDMS) that satisfies the above conditions. The precursor was successfully transformed to SiBCN fibers by electrospinning technology. The resulting SiBCN ceramic material produced by the new route has high performance and high-temperature resistance against crystallization. Furthermore, we have analyzed the mechanism of the synthesis and ceramization of the new soluble precursor by NMR, FT- IR and TG- MS, and the high- temperature stability of the resulting SiBCN powder has been analyzed a by DTA, XRD and SEM.

Research on Pavement Performance with Warm Mix Asphalt Concrete

2011 ◽  
Vol 418-420 ◽  
pp. 147-152 ◽  
Author(s):  
Yan Peng Lin ◽  
Bin Li
Keyword(s):  
Comparative Analysis ◽  
High Temperature ◽  
Epoxy Resin ◽  
Asphalt Concrete ◽  
Softening Point ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Warm Mix Asphalt ◽  
Pavement Performance ◽  
High Temperature Stability

Using SBR and epoxy to modified warm-mix asphalt, the penetrability, ductility, softening point of bitumen at different aging times are tested, the comparative analysis of the modified effects of two modified agents to the asphalt mixture is made; Construction temperature of asphalt is determined by using temperature - porosity curve; The results reflect epoxy resin and SBR can improve the high temperature stability and anti moisture infringement capacity, so propose to use warm mix asphalt concrete for the top layer except in special sections layer.

High Temperature Resistance of Epoxy Adhesives under the Room-Temperature Curing

2011 ◽  
Vol 284-286 ◽  
pp. 1804-1807 ◽  
Author(s):  
De Long Ran ◽  
Jian Jun Xie ◽  
Kai Huang ◽  
Shui Ping Yin ◽  
Sheng Ming Chen ◽  
...  
Keyword(s):  
High Temperature ◽  
Absorption Band ◽  
Epoxy Resin ◽  
Room Temperature ◽  
Loss Modulus ◽  
Technological Parameters ◽  
Temperature Resistance ◽  
Epoxy Adhesives ◽  
High Temperature Resistance ◽  
Long Chain

High-temperature resistant epoxy adhesives cured under room-temperature becomes more and more important in many industries such as aerospace and aviation, the locomotive and diesel, etc. In this paper three self-made amine-based mannich-amide was mixed with E-44 epoxy resin under the same technological parameters, and the epoxy adhesives cured by the three amine-based mannich-amides under room-temperature are tested by FTIR, TGA and DMA. Results of TGA show a quicker drop in weight occurrence within 150-250°C for epoxy networks cured by multiamine-based mannich amides than the long-chain alkyl one. Results of FTIR show completely curing of epoxy adhesives cured by mannich amides under room temperature and the height of absorption band 1502cm-1(C-N) is much lower after 12h under 150°C,200°C atmosphere than 25°C. Results of DMA show that the Tg determined by DMA has an order EP AN2(89.9°C) >EP AN1(89.7°C)>EP AN3(80.8°C). In the rest results of DMA, the EP-AN3 system has the biggest storage modulus (E’) within 100-150°C while the EP-AN3 system has the smallest loss modulus(E”) within 100-150°C. As a whole, the epoxy adhesives cured by AN3 under room-temperature have the best high temperature resistance.

Preparation of Epoxy Modified Organosilicone High-Temperature Resistance Coatings

2008 ◽  
Vol 373-374 ◽  
pp. 434-437
Author(s):  
Hua Zhu ◽  
Zhi Lang Chen ◽  
Fang Nan ◽  
An Lin ◽  
Fu Xing Gan
Keyword(s):  
High Temperature ◽  
Epoxy Resin ◽  
Adhesion Strength ◽  
Ring Opening ◽  
Epoxy Group ◽  
Temperature Resistance ◽  
Ring Opening Reaction ◽  
High Temperature Resistance ◽  
Solidification Reaction ◽  
The Fourier Transform

An ambient-cured organosilicone resin modified with epoxy resin was synthesized with lab-synthesized polysiloxane resin and biphenix-A epoxy resin(E-20) by copolymerization at 180~190 °C for 2~3 hours. The effect of ratios between polysiloxane resin and E-20, reaction temperatures and reaction time on heat resistance and miscibility etc were discussed in detail. The experiment results showed that the epoxy modified organosilicone resin exhibited the best solubility performance and adhesion strength when the ratio of the polysiloxane resin to E-20 was 3:7. The Fourier transform infrared spectra (FTIR) revealed that hydroxy on epoxy resin had reacted with ethyoxyl on organic silicon molecular chain, but no ring-opening reaction happened on epoxy group of E-20. The excellent high-temperature resistance painting, based on these epoxy modified organosilicone resin was prepared with flake aluminum powder as temperature resistance filler, polyamide 650 as curer and WD-50 coupling agent as curing-promoter. It was shown that the temperature resistance was superior to 600°C and the adhesion strength of the coating was up to 1 grade. Scanning electron microscope(SEM) revealed the reaction happened on -Si-O-Si- and Al under high temperature improved the coatings to resist higher temperature. The mechanism of the high-temperature anticorrosion is attributed to “ring-opening reaction” and “cross-link solidification reaction”.

Preparation of High-Temperature-Resistance Silicone Paints

2012 ◽  
Vol 602-604 ◽  
pp. 1676-1679
Author(s):  
Guo Jun Li ◽  
Yan Bin Wei ◽  
Rui Ming Ren
Keyword(s):  
High Temperature ◽  
Room Temperature ◽  
Cold Water ◽  
Silicone Resin ◽  
Pencil Hardness ◽  
Temperature Resistance ◽  
High Temperature Resistance ◽  
Powder Addition

Silicone paints were prepared by mixing as-synthesized silicone resin, pigments, fillers and other additives. The effects of the solvent, addition of pearlescent powder, addition of KH550, addition of butyl titanate and temperature on the performance of high-temperature-resistance silicon paints or coatings were studied. The results showed that the optimal coating was cured at room temperature and had no cracks after 10 times cold and hot alternation in the condition of 500oC~cold water. The pencil hardness and the adhesion of coating reached 3H and 1 level, respectively.

UNS N06455

Alloy Digest ◽  
1989 ◽  
Vol 38 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Stress Corrosion Cracking ◽  
Temperature Stability ◽  
Heat Treating ◽  
High Ductility ◽  
High Temperature Stability ◽  
Nickel Chromium ◽  
Long Time ◽  
Resistance To Stress

Abstract UNS NO6455 is a nickel-chromium-molybdenum alloy with outstanding high-temperature stability as shown by high ductility and corrosion resistance even after long-time aging in the range 1200-1900 F. The alloy also has excellent resistance to stress-corrosion cracking and to oxidizing atmospheres up to 1900 F. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-367. Producer or source: Nickel and nickel alloy producers.

UNS R54620

Alloy Digest ◽  
1987 ◽  
Vol 36 (7) ◽  
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Time Use ◽  
Temperature Stability ◽  
High Strength ◽  
Heat Treating ◽  
High Temperature Stability ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Long Time

Abstract UNS No. R54620 is an alpha-beta titanium alloy. It has an excellent combination of tensile strength, creep strength, toughness and high-temperature stability that makes it suitable for service to 1050 F. It is recommended for use where high strength is required. It has outstanding advantages for long-time use at temperatures to 800 F. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-86. Producer or source: Titanium alloy mills.

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