Kuznetsov, D. A.;Didenko, A. L.;Svetlichnyi, V. M.;Smirnova, V. E.;Popova, E. N.;Vaganov, G. V.;Yudin, V. E.;Kudryavtsev, V. V. published 《Effect of Hard Segment Structure on the Thermomechanical Properties of Polyurethaneimides》. The research results were published in《Polymer Science, Series A: Polymer Physics》 in 2019.Formula: C31H20O8 The article conveys some information:
New segmented polyurethaneimides containing poly(ethylene glycol adipate) soft segments and bis(urethaneimide) hard segments are synthesized. Copolymers are obtained on the basis of poly(ethylene glycol adipate) (Mn = 2.5 x 103) terminated with 2,4-toluene diisocyanate, two aromatic dianhydrides, and six aromatic diamines. The structure of the synthesized polymers is studied by IR and NMR spectroscopy. The thermal properties of the copolymers are characterized by TGA and DSC. Effects of hard segment length and substituent position in the diamine fragment on the thermal and mech. properties of the polyurethaneimides are investigated. And 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) was used in the research process.
5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.Formula: C31H20O8 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.
Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem