Annealing behavior and thermal stability of nanoporous polymer films based on high-performance Cyanate Ester Resins

Solution blow spinning (SBS) is an innovative nanofiber fabricating method with high productivity. 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) / p-phenylenediamine (PDA) / 4,4'-oxydianiline (ODA) co-polyimide nanofiber membrane was efficiently produced by SBS followed by imidization from precursor polyamic acid (PAA) nanofiber membrane in the paper. The morphologies and structures of the obtained PAA and PI nanofiber membrane were examined by SEM and FT-IR. The effect of thermal imidization temperature on the tensile property was investigated. The thermal stability of polyimide nanofiber membrane was also characterized by TGA.

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Effect of Pre-Strain Rolling on Annealing Behavior of Friction-Stir Welded AA6061-T6 Aluminum Alloy

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.385.355 ◽

2018 ◽

Vol 385 ◽

pp. 355-358 ◽

Cited By ~ 2

Author(s):

Sergey Mironov ◽

Sergey Malopheyev ◽

Igor Vysotskiy ◽

Daria Zhemchuzhnikova ◽

Rustam Kaibyshev

Keyword(s):

Heat Treatment ◽

Thermal Stability ◽

Aluminum Alloy ◽

Cold Rolling ◽

Grain Growth ◽

Rolling Schedule ◽

Annealing Behavior ◽

Friction Stir ◽

Welding Direction ◽

Thermal Stability Of

In this work, the effect of pre-strain cold rolling on thermal stability of friction-stir welded AA6061-T6 alloy was studied. The pre-strain rolling was found to be very effective in suppression of abnormal grain growth during standard post-weld T6 heat treatment. It was also shown that the efficiency of this approach essentially depends on rolling path and the rolling along welding direction was the most effective rolling schedule.

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Thermal stability of Mg3Sb1.475Bi0.475Te0.05 high performance n-type thermoelectric investigated through powder X-ray diffraction and pair distribution function analysis

Journal of Materials Chemistry A ◽

10.1039/c8ta06544f ◽

2018 ◽

Vol 6 (35) ◽

pp. 17171-17176 ◽

Cited By ~ 11

Author(s):

Lasse Rabøl Jørgensen ◽

Jiawei Zhang ◽

Christian Bonar Zeuthen ◽

Bo Brummerstedt Iversen

Keyword(s):

Thermal Stability ◽

Distribution Function ◽

Pair Distribution Function ◽

High Performance ◽

Function Analysis ◽

X Ray Diffraction ◽

X Ray ◽

Thermal Stability Of

The thermal stability of the high performance n-type Te-doped Mg3Sb1.5Bi0.5 system is investigated.

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Curing Kinetics and Thermal Stability of Epoxy Composites Containing Newly Obtained Nano-Scale Aluminum Hypophosphite (AlPO2)

Polymers ◽

10.3390/polym12030644 ◽

2020 ◽

Vol 12 (3) ◽

pp. 644 ◽

Cited By ~ 17

Author(s):

Farimah Tikhani ◽

Shahab Moghari ◽

Maryam Jouyandeh ◽

Fouad Laoutid ◽

Henri Vahabi ◽

...

Keyword(s):

Electron Microscopy ◽

Thermal Stability ◽

High Performance ◽

Frequency Factor ◽

Curing Temperature ◽

Heating Rates ◽

Scanning Calorimetry ◽

Nano Scale ◽

Aluminum Hypophosphite ◽

Thermal Stability Of

For the first time, nano-scale aluminum hypophosphite (AlPO2) was simply obtained in a two-step milling process and applied in preparation of epoxy nanocomposites varying concentration (0.1, 0.3, and 0.5 wt.% based on resin weight). Studying the cure kinetics and thermal stability of these nanocomposites would pave the way toward the design of high-performance nanocomposites for special applications. Scanning electron microscopy (SEM) and transmittance electron microscopy (TEM) revealed AlPO2 particles having domains less than 60 nm with high potential for agglomeration. Excellent (at heating rate of 5 °C/min) and Good (at heating rates of 10, 15 and 20 °C/min) cure states were detected for nanocomposites under nonisothermal differential scanning calorimetry (DSC). While the dimensionless curing temperature interval (ΔT*) was almost equal for epoxy/AlPO2 nanocomposites, dimensionless heat release (ΔH*) changed by densification of polymeric network. Quantitative cure analysis based on isoconversional Friedman and Kissinger methods gave rise to the kinetic parameters such as activation energy and the order of reaction as well as frequency factor. Variation of glass transition temperature (Tg) was monitored to explain the molecular interaction in the system, where Tg increased from 73.2 °C for neat epoxy to just 79.5 °C for the system containing 0.1 wt.% AlPO2. Moreover, thermogravimetric analysis (TGA) showed that nanocomposites were thermally stable.

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