Cure kinetics of a flexible aromatic dicyanate with schiff base structure

1995 ◽  
Vol 58 (9) ◽  
pp. 1585-1592 ◽  
Author(s):  
Ying-Hung Wang ◽  
Yeng-Long Hong ◽  
Jin-Long Hong
Keyword(s):  
Schiff Base ◽  
Cure Kinetics ◽  
Kinetics Of ◽  
Aromatic Dicyanate ◽  
Base Structure

Effects of additives on the cure kinetics of vinyl ester pultrusion resins

2021 ◽  
pp. 002199832110015
Author(s):  
Alexander Vedernikov ◽  
Yaroslav Nasonov ◽  
Roman Korotkov ◽  
Sergey Gusev ◽  
Iskander Akhatov ◽  
...  
Keyword(s):  
Vinyl Ester ◽  
Mean Squared Error ◽  
Cure Kinetics ◽  
Zinc Stearate ◽  
Heating Rates ◽  
Scanning Calorimetry ◽  
Different Temperatures ◽  
Predicted Values ◽  
Kinetics Of ◽  
Final Degree

Pultrusion is a highly efficient composite manufacturing process. To accurately describe pultrusion, an appropriate model of resin cure kinetics is required. In this study, we investigated cure kinetics modeling of a vinyl ester pultrusion resin (Atlac 430) in the presence of aluminum hydroxide (Al(OH)3) and zinc stearate (Zn(C18H35O2)2) as processing additives. Herein, four different resin compositions were studied: neat resin composition, composition with Al(OH)3, composition comprising Zn(C18H35O2)2, and composition containing both Al(OH)3 and Zn(C18H35O2)2. To analyze each composition, we performed differential scanning calorimetry at the heating rates of 5, 7.5, and 10 K/min. To characterize the cure kinetics of Atlac 430, 16 kinetic models were tested, and their performances were compared. The model based on the [Formula: see text]th-order autocatalytic reaction demonstrated the best results, with a 4.5% mean squared error (MSE) between the experimental and predicted data. This study proposes a method to reduce the MSE resulting from the simultaneous melting of Zn(C18H35O2)2. We were able to reduce the MSE by approximately 34%. Numerical simulations conducted at different temperatures and pulling speeds demonstrated a significant influence of resin composition on the pultrusion of a flat laminate profile. Simulation results obtained for the 600 mm long die block at different die temperatures (115, 120, 125, and 130 °C) showed that for a resin with a final degree of cure exceeding 95% at the die exit, the maximum difference between the predicted values of pulling speed for a specified set of compositions may exceed 1.7 times.

Nonisothermal cure kinetics of epoxy/Zn Fe3-O4 nanocomposites

2019 ◽  
Vol 136 ◽  
pp. 105290 ◽  
Author(s):  
Maryam Jouyandeh ◽  
Zohre Karami ◽  
Samir M. Hamad ◽  
Mohammad Reza Ganjali ◽  
Vahideh Akbari ◽  
...  
Keyword(s):  
Cure Kinetics ◽  
Kinetics Of ◽  
Nonisothermal Cure

Cd(II) coordination polymer of fumaric acid and pyridyl-hydrazide Schiff base: Structure, photoconductivity and theoretical interpretation

2021 ◽  
Vol 518 ◽  
pp. 120253
Author(s):  
Angeera Chandra ◽  
Dhananjoy Das ◽  
Joaquín-Ortega Castro ◽  
Kaushik Naskar ◽  
Srikanta Jana ◽  
...  
Keyword(s):  
Schiff Base ◽  
Coordination Polymer ◽  
Fumaric Acid ◽  
Theoretical Interpretation ◽  
Base Structure

Excited state proton transfer and photochromism of an aromatic Schiff base. Pico- and femtosecond kinetics of the N,N′-bis(salicylidene)-p-phenylenediamine (BSP)

2003 ◽  
Vol 369 (1-2) ◽  
pp. 80-89 ◽  
Author(s):  
Marcin Ziółek ◽  
Jacek Kubicki ◽  
Andrzej Maciejewski ◽  
Ryszard Naskrȩcki ◽  
Anna Grabowska
Keyword(s):  
Schiff Base ◽  
Excited State ◽  
Proton Transfer ◽  
Excited State Proton Transfer ◽  
Kinetics Of
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