Modulated differential scanning calorimetry: XVI. Degree of mixing in interpenetrating polymer networks

1998 ◽  
Vol 315 (1) ◽  
pp. 25-32 ◽  
Author(s):  
M. Song ◽  
D.J. Hourston ◽  
F-U. Schafer ◽  
H.M. Pollock ◽  
A. Hammiche
Keyword(s):  
Differential Scanning Calorimetry ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Scanning Calorimetry ◽  
Modulated Differential Scanning Calorimetry

Interpenetrating polymer networks formed by cyanate esters and phenylethynyl-terminated imides

2016 ◽  
Vol 29 (5) ◽  
pp. 556-568 ◽  
Author(s):  
Christoph Meier ◽  
Patricia P Parlevliet ◽  
Manfred Döring
Keyword(s):  
Polymer Networks ◽  
Covalent Bond ◽  
High Heat ◽  
Interpenetrating Polymer Networks ◽  
Scanning Calorimetry ◽  
Modulated Differential Scanning Calorimetry ◽  
Thermal Gravimetry ◽  
Pendent Group ◽  
Very High ◽  
End Group

An oligomeric phenylethynyl-terminated imide (PETI) has been formulated with a cyanate ester (CE) with and without the addition of a compatibilizer 2,2′-diallylbisphenol A (DABPA) forming interpenetrating polymer networks (IPNs). Modulated differential scanning calorimetry (mDSC) was used to monitor the curing of the resin mixtures. The formation of various resulting IPNs was verified using mDSC, dynamical mechanical thermoanalysis (DMTA), thermal gravimetry analysis and scanning electron microscopy. Furthermore, it could be shown by mDSC and DMTA that a covalent bond of the separated CE and PETI networks could be achieved by the addition of DABPA. In this regard, a reaction mechanism is proposed for the cross-linking reaction between the allylic pendent group of DABPA and the phenylethynyl end-group of the PETI resin. The cured resin specimens showed to have very high heat resistance and very high glass transition temperatures up to 330°C.

Damping Property of Polyurethane/Poly(methylmethacrylate-butylmethacrylate-2-Hydroxyethyl methacrylate) Interpenetrating Polymer Networks

2012 ◽  
Vol 430-432 ◽  
pp. 297-300
Author(s):  
Guo Jing Song ◽  
Mei Ju Liu ◽  
Jin Yi ◽  
Yong Gang Xu
Keyword(s):  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Loss Factor ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Hydroxyethyl Methacrylate ◽  
Damping Properties ◽  
Scanning Calorimetry ◽  
Glass Transition Temperatures ◽  
Tan Δ

Polyurethane/poly (methylacrylate-butylmethacrylate-2-Hydroxyethylmethacrylate) Interpenetrating polymernetworks (IPNs) were prepared by sequential polymerization. Their glass transition performance was measured by using differential scanning calorimetry (DSC). DSC results revealed there are three glass transition temperatures (Tg) for both IPNs samples. Their damping properties were evaluated according to ASTM E756-05. Their loss factor (tan δ>0.3) from 10-1300Hz displays a wide temperature range of 94°C.

scholarly journals Effect of Poly(Titanium Oxide) on the Viscoelastic and Thermophysical Properties of Interpenetrating Polymer Networks

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 794
Author(s):  
Tamara Tsebriienko ◽  
Anatoli I. Popov
Keyword(s):  
Differential Scanning Calorimetry ◽  
Titanium Oxide ◽  
Thermophysical Properties ◽  
Sol Gel ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Oxide Content ◽  
Hydroxyethyl Methacrylate ◽  
Inorganic Component ◽  
Scanning Calorimetry

The influence of poly(titanium oxide) obtained using the sol-gel method in 2-hydroxyethyl methacrylate medium on the viscoelastic and thermophysical properties of interpenetrating polymer networks (IPNs) based on cross-linked polyurethane (PU) and poly(hydroxyethyl methacrylate) (PHEMA) was studied. It was found that both the initial (IPNs) and organo-inorganic interpenetrating polymer networks (OI IPNs) have a two-phase structure by using methods of dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). The differential scanning calorimetry methods and scanning electron microscopy (SEM) showed that the presence of poly(titanium oxide) increases the compatibility of the components of IPNs. It was found that an increase in poly(titanium oxide) content leads to a decrease in the intensity of the relaxation maximum for PHEMA phase and an increase in the effective crosslinking density due to the partial grafting of the inorganic component to acrylate. It was shown that the topology of poly(titanium oxide) structure has a significant effect on the relaxation behavior of OI IPNs samples. According to SEM, a uniform distribution of the inorganic component in the polymer matrix is observed without significant aggregation.

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