Effect of molecular chain structure of the cured epoxy resin containing hyperbranched (3-hydroxyphenyl) phosphate on expansion and flame retardance

2004 ◽  
Vol 94 (5) ◽  
pp. 2065-2070 ◽  
Author(s):  
Jing Deng ◽  
Shengwu Zhu ◽  
Wenfang Shi
Keyword(s):  
Epoxy Resin ◽  
Chain Structure ◽  
Molecular Chain ◽  
Flame Retardance

scholarly journals Preparation and characterization of polydopamine/melamine microencapsulated red phosphorus and its flame retardance in epoxy resin

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20391-20402
Author(s):  
Chen Cheng ◽  
Yanling Lu ◽  
Weining Ma ◽  
Shaojie Li ◽  
Jun Yan ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Epoxy Resin ◽  
Shell Structure ◽  
Composite Shell ◽  
Intumescent Flame Retardant ◽  
Smoke Suppression ◽  
Flame Retardance ◽  
Red Phosphorus ◽  
Composite Shell Structure

Red phosphorus was coated by a polydopamine/melamine composite shell structure, which constituted an intumescent flame retardant with superior flame retardance and smoke suppression performance for epoxy resin.

Characterization of the trans-structure in the molecular chain structure of natural rubber

2021 ◽  
pp. 131209
Author(s):  
Zechun Li ◽  
Changjin Yang ◽  
Yanchan Wei ◽  
Yuanbing Zhou ◽  
Shuangquan Liao
Keyword(s):  
Natural Rubber ◽  
Chain Structure ◽  
Molecular Chain ◽  
Trans Structure

scholarly journals A Study on the Synthesis, Curing Behavior and Flame Retardance of a Novel Flame Retardant Curing Agent for Epoxy Resin

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 245
Author(s):  
Yong Sun ◽  
Yongli Peng ◽  
Yajiao Zhang
Keyword(s):  
Flame Retardant ◽  
Epoxy Resin ◽  
Decomposition Temperature ◽  
Isothermal Kinetics ◽  
Flame Retardance ◽  
Curing Agent ◽  
Initial Decomposition Temperature ◽  
Limiting Oxygen Index ◽  
Epoxy Resin System ◽  
Dsc Method

In this work, a flame retardant curing agent (DOPO-MAC) composed of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide DOPO and methyl acrylamide (MAC) was synthesized successfully, and the structure of the compound was characterized by FT-IR and 1H-NMR. The non-isothermal kinetics of the epoxy resin/DOPO-MAC system with 1% phosphorus was studied by non-isothermal DSC method. The activation energy of the reaction (Ea), about 46 kJ/mol, was calculated by Kissinger and Ozawa method, indicating that the curing reaction was easy to carry out. The flame retardancy of the epoxy resin system was analyzed by vertical combustion test (UL94) and limiting oxygen index (LOI) test. The results showed that epoxy resin (EP) with 1% phosphorus successfully passed a UL-94 V-0 rating, and the LOI value increased along with the increasing of phosphorus content. It confirmed that DOPO-MAC possessed excellent flame retardance and higher curing reactivity. Moreover, the thermal stability of EP materials was also investigated by TGA. With the DOPO-MAC added, the residual mass of EP materials increased remarkably although the initial decomposition temperature decreased slightly.

The Effect of Epoxide on Molecular Chain Relaxation on Bisphenol A Epoxy Resin after Curing

2021 ◽  
Author(s):  
Mingru Li ◽  
Zhuoli Cai ◽  
Huan Niu ◽  
Shengtao Li ◽  
Yafang Gao ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Molecular Chain

scholarly journals Effect of molecular weight on CO2-philicity of poly(vinyl acetate) with different molecular chain structure

2016 ◽  
Vol 118 ◽  
pp. 96-106 ◽  
Author(s):  
Dongdong Hu ◽  
Yingna Zhang ◽  
Mei Su ◽  
Lei Bao ◽  
Ling Zhao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Vinyl Acetate ◽  
Chain Structure ◽  
Molecular Chain

Spectroscopic study on the molecular polar arrangement and anchoring mechanism in crystalline DR1 films deposited on ITO by electric field assisted PVD process

2018 ◽  
Vol 27 (02) ◽  
pp. 1850021
Author(s):  
H. Herman ◽  
R. E. Siregar ◽  
M. O. Tjia
Keyword(s):  
Electric Field ◽  
Physical Vapor Deposition ◽  
Second Harmonic ◽  
Chain Structure ◽  
Molecular Chain ◽  
Sem Images ◽  
Film Stability ◽  
Hydrogen Bondings ◽  
Deposited Films ◽  
Transmission And Reflection

We report the results of a systematic study for the elucidation of detailed molecular arrangements in Disperse Red 1(DR1) films prepared by electric field assisted physical vapor deposition (EFA-PVD) method on ITO substrate with varied field strength. Aside from confirming the periodic molecular chain structure reported previously, the electric field induced increase of crystallinity is corroborated by the enhanced crystalline appearance in the SEM images of the films deposited with increased applied field up to a certain limit. The optical spectroscopic measurements in both the transmission and reflection modes clearly show that instead of the anti-parallel polar arrangement found previously in films deposited without the applied electric field, it is the parallel arrangements of molecular aggregates that are found in the currently produced films which offer its potential application for the generation of second harmonic (SH) light. A detailed analysis of the additional FTIR-RAS data further reveals the formation of hydrogen bondings in the head-to-tail stacking along the molecular chain responsible for its periodic structure, as well as those between the DR1 hydroxyl end groups and the oxide components in the ITO substrate which provides the molecular immobilizing or anchoring mechanism for the deposited films. This explains in turn, the improved film stability and the formation of the highly desirable parallel polar arrangement of the DR1 molecules in the deposited films, promising for SHG and other related nonlinear optical (NLO) applications.

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