Influence of glass transition temperature of crosslinked unsaturated polyester resin/styrene formulations on the final conversion after an isothermal curing at 100°C

2020 ◽  
Vol 31 (9) ◽  
pp. 2031-2037 ◽  
Author(s):  
Christelle Delaite ◽  
Sophie Bistac ◽  
Elodie Dreyer ◽  
Anne‐Sophie Schuller
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Final Conversion

scholarly journals Preparation and Properties of Polyester-Based Nanocomposite Gel Coat System

2006 ◽  
Vol 2006 ◽  
pp. 1-7 ◽  
Author(s):  
P. Jawahar ◽  
M. Balasubramanian
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Barrier Properties ◽  
Mechanical Analysis ◽  
Water Barrier

Nanocomposite gel coat system is prepared using unsaturated polyester resin with aerosil powder,CaCO3, and organoclay. The influence of organoclay addition on mechanical and water barrier properties of gel coat system is studied for different amount (1, 2, and 3 wt%) of organoclay. The nanolevel incorporation of organoclay improves the mechanical and water barrier properties of nanocomposite gel coat system. The nanocomposite gel coat system exhibits 55%improvement in tensile modulus and 25%improvement in flexural modulus. There is a 30%improvement in impact property of nanocomposite gel coat system. The dynamic mechanical analysis shows a slight increase in glass transition temperature for nanocomposite gel coat system.

scholarly journals MODIFICATION OF OLIGOESTER MALEINATE BY ALKYL ESTER OF N-MALEINIMIDOBENZOIC ACID

2019 ◽  
Vol 62 (12) ◽  
pp. 78-84
Author(s):  
Vladimir A. Danilov ◽  
Oleg A. Kolyamshin ◽  
Nadezhda E. Temnikova ◽  
Oleg V. Stoyanov ◽  
Marina V. Kolpakova
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Unsaturated Polyester ◽  
Ester Group ◽  
Thermomechanical Properties ◽  
Hydrocarbon Radical ◽  
Butyl Ether ◽  
Effect Of Substituents ◽  
Aromatic Group

When using products from unsaturated polyester resins (NPS), often increased requirements for thermal and chemical resistance are raised. Increasing the thermal stability of the PS is possible due to the modification of resins by polymerization compounds, which can copolymerize with both oligoether maleinate and styrene. One of such effective additives is N-phenylmaleinimides. The paper presents the results of modification of unsaturated polyester grade PN-1 UT with alkyl ethers n-maleinimidobenzoic acid. The properties of terpolymers are investigated. The effect of substituents of the aromatic group with N-phenylmaleinimides on the properties of terpolymers was investigated. It is also of interest to study the effect of substituents of the aromatic group in N-phenylmaleinimide on the properties of modified polymers. It is shown that terpolymers due to their maleinimides are superior in strength and thermomechanical properties of the copolymers of oligoestermaleinate and styrene. The increase in the size of the hydrocarbon radical substituents of the aromatic group of maleinimides contributes to the increase of the thermo-and physico-mechanical properties of terpolymers. It is also shown that the glass transition temperature of polymers depends on the content of maleinimides, as well as on the structure of the aromatic group. With an increase in the content of maleinimides (up to 5 wt. %) there is an increase in the glass transition temperature and the beginning of the destructive flow. The greatest increase in glass transition temperature (30 °C) is observed at a content of 3 wt. % butyl ether of n-maleimidobenzoic acid. The increase in the length of the hydrocarbon radical (С5Н11 and С8Н17) of the ester group of n-maleimidobenzoic acid leads to the appearance of a plasticizing effect. Synthesized terpolymers can be recommended as binders in the production of heat-resistant composite materials, in particular, fiberglass.

Improving glass transition temperature of unsaturated polyester thermosets: Conventional unsaturated polyester resins

2020 ◽  
Vol 138 (6) ◽  
pp. 49825
Author(s):  
Moritz Stuck ◽  
Irina Krenz ◽  
Benedikt Schulze Kökelsum ◽  
Susanne Boye ◽  
Brigitte Voit ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Unsaturated Polyester ◽  
Polyester Resins ◽  
Unsaturated Polyester Resins

Thermal and FTIR Characterization of Unsaturated Polyester Resin/Epoxy Resin Composites

2011 ◽  
Vol 117-119 ◽  
pp. 905-907 ◽  
Author(s):  
Zheng Fu Liao ◽  
Dong Ying Xu ◽  
Fengjun Zhang ◽  
Chong Li ◽  
Wu Hua Xiao
Keyword(s):  
Glass Transition ◽  
Epoxy Resin ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Resin Composites ◽  
Reactive Blending ◽  
Ftir Characterization ◽  
Blending Method

In the paper, the thermo-properties of unsaturated polyester resin (UPR)/epoxy resin(E51) composites through reactive blending method were studied by DSC. The experimental results showed that, when the amount of E51 in UPR/E51 composites reached to 2wt%, the mixture take place glass transition at 84°C which higher than that of pure UPR 15%. When the amount of E51 reached to 10wt%, the mixture take place two glass transition at 59°C、104°C respectively. The morphologies of the mixtures were investigated by SEM, and the curing process of UPR/E51 was traced and investigated by FTIR.

scholarly journals Development of Epoxy-Polyester Composite with Improved Thermophysical Properties for Restoration of Details of Sea and River Transport

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
A. Buketov ◽  
M. Brailo ◽  
S. Yakushchenko ◽  
A. Sapronova
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Thermal Resistance ◽  
Thermophysical Properties ◽  
Polyester Resin ◽  
Linear Shrinkage ◽  
Nonlinear Dependence ◽  
Thermal Coefficient ◽  
Polyester Matrix

The results of the experimental investigations of the optimization of the content of the polyester resin in the epoxy binder are shown in the work. It was determined that composite with concentration of the polyester (q = 10 mas.fr.) was characterized by the maximal values of the thermophysical properties. The Martens thermal resistance temperature, the linear shrinkage, the thermal coefficient of linear expansion, and the glass transition temperature of the epoxy-polyester matrix were investigated. It was found that introducing the polyester resin into the epoxy oligomer in quantity of q = 10 mas.fr. leads to improving the Martens thermal resistance of the material to the T = 352 K and decreasing the linear shrinkage to the Δl = 0.06%. The nonlinear dependence of the TCLE on the temperature was confirmed, and the tendency of changes in their values, depending on the content of polyester resin, was defined. The dilatometric curves were analyzed, and the glass transition temperature of developed epoxy-polyester matrix was determined at the level Tс = 318 K.

Sign in / Sign up

Export Citation Format

Share Document