Dissertation > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polycondensation resin and plastic > Polyester resins and plastic materials > Unsaturated polyester

Unsaturated Polyester Resin Modified by Unsaturated POSS

Author LiShuRong
Tutor GaoJunGang
School Hebei University
Course Polymer Chemistry and Physics
Keywords Unsaturated polyester Cage silsesquioxane Curing kinetics Composites Mechanical Properties
CLC TQ323.41
Type Master's thesis
Year 2009
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Order to obtain the use of performance more excellent in the unsaturated polyester resin , different methods can be used on the unsaturated polyester resin modified, adding nano- materials in the synthesis process of the unsaturated polyester resin , is one of them . Synthesized methacryloyloxy propyl cage siloxane (MAP-POSS) and vinyl cage -half times the siloxane ( V - POSS) , and its structure was characterized , research unsaturated base cage silsesquioxane / curing kinetics of unsaturated polyester systems , thermal and electrical properties of laminated glass plate and mechanical properties . DSC study using dynamic methacryloyloxy propyl cage type silsesquioxane (MAP-POSS) / UPR nanohybrid of curing reaction of the composite system , the results show that the UPR, styrene and MAP-POSS than good compatibility and can be co-cured , MAP-POSS can be uniformly dispersed in the UPR the matrix formed in situ nano molecular composites . Curing kinetics parameters were determined to establish the mathematical model of the curing reaction kinetics . Thermal stability using thermal gravimetric analysis results indicate that The composite thermal decomposition in two steps, the first-order kinetics and obey . Cage -type silsesquioxane methyl acryloxypropyl (MAP-POSS) modified unsaturated polyester resins (UPR) were prepared as the base system , the composite material of the laminated glass plate , its mechanical properties and electrical properties the test results show that w (MAP-POSS) = 5% , the best mechanical properties , and have good dielectric properties . Using non-isothermal DSC method to study the relationship between the the UPR and of 5% V-POSS/UPR system curing reaction kinetics and the apparent activation energy and the conversion rate , determination of the mechanical and electrical properties of the FRP laminate . The results showed that the V-POSS, was added to the curing reaction Ea decreased with the increase of the degree of reaction , the process of curing reaction is described by using the model of the two parameters Sestak-Berggren (SB) , and the kinetic equation . When the V-POSS mass fraction of 5 % , the tensile strength of the FRP laminate improved 17.6kJ · m-2, the impact strength decreases with the V-POSS increased amount , but an increase in impact strength at 10% . Improve the electrical properties of the laminate with the increase in the amount of V-POSS joined , wherein ρv and ρs raise of 1-2 orders of magnitude .

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