Preparation of self-promoted hydroxy-containing phthalonitrile resins by an in situ reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 105038-105046 ◽  
Author(s):  
Jianbo Wang ◽  
Jianghuai Hu ◽  
Ke Zeng ◽  
Gang Yang
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Hydroxy Group ◽  
High Modulus ◽  
High Glass Transition Temperature ◽  
One Pot ◽  
In Situ Reaction

The in situ reaction of a hydroxy group with a phthalonitrile system was carried out in a one-pot reaction and the prepared polymers showed outstanding thermal stability, a high modulus and a high glass transition temperature.

Precisely designed perylene bisimide-substituted polyethylene with a high glass transition temperature and an ordered architecture

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68765-68772 ◽  
Author(s):  
Wei Song ◽  
Jianhua Wu ◽  
Guangda Yang ◽  
Huijing Han ◽  
Meiran Xie ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Acyclic Diene Metathesis ◽  
High Glass Transition Temperature ◽  
Metathesis Polymerization ◽  
Good Thermal Stability ◽  
Perylene Bisimide ◽  
Acyclic Diene Metathesis Polymerization

A polyethylene with a precise repeat of perylene bisimide branches was synthesized by acyclic diene metathesis polymerization and hydrogenation of the as-synthesized polymer, and displayed good thermal stability and an ordered architecture.

Development of bio-acrylic polymers from Cyrene™: transforming a green solvent to a green polymer

2019 ◽  
Vol 10 (24) ◽  
pp. 3334-3341 ◽  
Author(s):  
Parijat Ray ◽  
Timothy Hughes ◽  
Craig Smith ◽  
Mena Hibbert ◽  
Kei Saito ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
High Reactivity ◽  
Green Solvent ◽  
High Glass Transition Temperature ◽  
Acrylic Polymers ◽  
Green Polymer ◽  
Very High

A bio-based methacrylic polymer derived from a green solvent, Cyrene™ through a green synthesis pathway with very high glass transition temperature, thermal stability and high reactivity.

A pure blue emitter (CIEy ≈ 0.08) of chrysene derivative with high thermal stability for OLED

2015 ◽  
Vol 3 (8) ◽  
pp. 1794-1798 ◽  
Author(s):  
Yao-Hsien Chung ◽  
Lei Sheng ◽  
Xing Xing ◽  
Lingling Zheng ◽  
Mengying Bian ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
High Thermal Stability ◽  
High Glass Transition Temperature

A chrysene derivative, BPCC (6,12-bis(9-phenyl-9H-carbazol-3-yl)chrysene), possessing high thermal stability with a high glass transition temperature (Tg = 181 °C) was synthesized.

scholarly journals A Zn-MOF-Catalyzed Terpolymerization of Propylene Oxide, CO2, and β-butyrolactone

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 393 ◽  
Author(s):  
Sudakar Padmanaban ◽  
Sivanesan Dharmalingam ◽  
Sungho Yoon
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Propylene Oxide ◽  
One Pot ◽  
The One ◽  
First Time ◽  
Poly Carbonate ◽  
Thermal Stability Of

The terpolymerization of propylene oxide (PO), CO2, and a lactone is one of the prominent sustainable procedures for synthesizing thermoplastic materials at an industrial scale. Herein, the one-pot terpolymerization of PO, CO2, and β-butyrolactone (BBL) was achieved for the first time using a heterogeneous nano-sized catalyst: zinc glutarate (ZnGA-20). The reactivity of both PO and BBL increased with the CO2 pressure, and the polyester content of the terpolymer poly (carbonate-co-ester) could be tuned by controlling the infeed ratio of PO to BBL. When the polyester content increased, the thermal stability of the polymers increased, whereas the glass transition temperature (Tg) decreased.

High-temperature carbon plastics based on thermoreactive polyimide binder

2020 ◽  
pp. 89-102
Author(s):  
M. I. Valueva ◽  
I. V. Zelenina ◽  
M. A. Zharinov ◽  
M. A. Khaskov
Keyword(s):  
Glass Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Strength Properties ◽  
High Glass Transition Temperature ◽  
Reinforced Plastics ◽  
Carbon Plastics ◽  
Fundamental Possibility ◽  
Fiber Reinforced Plastics

The article presents results of studies of experimental carbon plastics based on thermosetting PMRpolyimide binder. Сarbon fiber reinforced plastics (CFRPs) are made from prepregs prepared by melt and mortar technologies, so the rheological properties of the polyimide binder were investigated. The heat resistance of carbon plastics was researched and its elastic-strength characteristics were determined at temperatures up to 320°С. The fundamental possibility of manufacturing carbon fiber from prepregs based on polyimide binder, obtained both by melt and mortar technologies, is shown. CFRPs made from two types of prepregs have a high glass transition temperature: 364°C (melt) and 367°C (solution), with this temperature remaining at the 97% level after boiling, and also at approximately the same (86–97%) level of conservation of elastic strength properties at temperature 300°С.

scholarly journals Cure Kinetics Modeling of a High Glass Transition Temperature Epoxy Molding Compound (EMC) Based on Inline Dielectric Analysis

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1734
Author(s):  
Erick Franieck ◽  
Martin Fleischmann ◽  
Ole Hölck ◽  
Larysa Kutuzova ◽  
Andreas Kandelbauer
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Kinetic Parameters ◽  
Measurement Techniques ◽  
Process Conditions ◽  
Dielectric Analysis ◽  
High Glass Transition Temperature ◽  
General Process ◽  
Molding Compound

We report on the cure characterization, based on inline monitoring of the dielectric parameters, of a commercially available epoxy phenol resin molding compound with a high glass transition temperature (>195 °C), which is suitable for the direct packaging of electronic components. The resin was cured under isothermal temperatures close to general process conditions (165–185 °C). The material conversion was determined by measuring the ion viscosity. The change of the ion viscosity as a function of time and temperature was used to characterize the cross-linking behavior, following two separate approaches (model based and isoconversional). The determined kinetic parameters are in good agreement with those reported in the literature for EMCs and lead to accurate cure predictions under process-near conditions. Furthermore, the kinetic models based on dielectric analysis (DEA) were compared with standard offline differential scanning calorimetry (DSC) models, which were based on dynamic measurements. Many of the determined kinetic parameters had similar values for the different approaches. Major deviations were found for the parameters linked to the end of the reaction where vitrification phenomena occur under process-related conditions. The glass transition temperature of the inline molded parts was determined via thermomechanical analysis (TMA) to confirm the vitrification effect. The similarities and differences between the resulting kinetics models of the two different measurement techniques are presented and it is shown how dielectric analysis can be of high relevance for the characterization of the curing reaction under conditions close to series production.

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