Synthesis and Properties of Multiblock Terpoly(Ester-Aliphatic- Amide) and Terpoly(Ester-Ether-Amide) Thermoplastic Elastomers with Various Chemical Compositions of Ester Block

Abstract

Two series of thermoplastic elastomers with various chemical compositions of ester block were prepared via the reaction of ,ω-dicarboxylic oligo laurolactam P" , Mw≈ g/mol with oligo oxytetramethylene diol PTMO, Mw≈ g/mol or linoleic alcohol dimer DL"ol and with dimethyl terephthalate and a low molecular weight glycol forming during the synthesis of the ester block . The degree of polycondensation DP GT of poly multi-methylene terephtalate equals to DP GT = . The influence of the number of carbons separating the terephtalate groups, as well as the effect of meta-or para-positions of the ester groups in the benzene ring of other blocks, on the synthesis, properties and structure of these elastomers have been evaluated. " nuclear magnetic resonance spectroscopy to carbon C NMR and Fourier transform infrared spectroscopy FT-IR were used to confirm their assumed chemical structure.The influence of chemical compositions of ester block on the functional properties and on the values of phase transition temperatures of the products have been determined.The thermal properties and the phase separation of obtained systems were defined by differential scanning calorimetry DSC , dynamic mechanical thermal analysis DMT" , wide-angle x-ray diffraction W"XS and other standard physical methods.The mechanical and elastic properties of obtained polymers were evaluated.

Wpływ stopnia polimeryzacji bloku estrowego na strukturę oraz właściwości blokowych terpolimerów estrowo-eterowo-amidowych

“…For TPEEA synthesis, dimethyl terephthalate (DMT) (Elana, Poland); 1,3-propanediol (3G) (Sigma-Aldrich, USA); poly(tetramethyleneoxide)diol (PTMO) (M w = 1000 g/mol, Du Pont, USA); α,ω-dicarboxilic oligo(laurolactam) (OA12) (M w = 2000 g/mol) obtained inhouse, according to the procedure described in [52]; pentaerythritol (technological additive increasing the melt viscosity of the polymer) -Brenntag, Germany; TiO 2 /SiO 2 as a catalyst (Sachtleben Chemic GmbH, Germany); Irganox 1010 and Irgafos 126 as thermal stabilizers (Ciba Geigy, Switzerland); triethyl phosphate (TEP) as thermooxidative stabilizer (Rhodia, Belgium) were used.…”

Understanding and controlling the glass transition of HTPB oligomers

“…20,21 Historically, the investigation and development of binder materials has been achieved through the costly and time-consuming combination of chemical synthesis and analysis. 2,18,26,[29][30][31][32][33][34][35][36] Whilst effective for honing specific material systems, this approach has not directly addressed more general questions such as: what, at a molecular scale, characterizes a "good" binder? Further, it has systemically limited both the transferability of understanding between systems, and the consideration of design principles with which to guide the development of future binder materials.…”

Cross‐linking of γ‐Cyclodextrin Using Non‐toxic Polyethylene Glycol Spacer Units

“…Several types of polymers such copolyesters, styrenes, polyurethanes, polyamides and polyolefin blends, [1][2][3] can be crosslinked with bifunctional or multifunctional molecules such as isocyanates, polyols or diazides to create toughened 3D networks with a variety of properties. [4][5][6][7][8][9] Naturally occurring materials such as proteins and carbohydrates can also be used in cross-linking reactions producing derivatives for various types of applications.…”

“…The γCPCD samples were also compared to the γCD and PEGDGE precursors by FTIR spectroscopy (SI, Figure S2). The strong absorption at 2940 cm À 1 (symmetric stretching of CH 2 and CH), 2871 cm À 1 (asymmetric stretching PEG: γCD unit ratio T g [1] (°C) T m [2] (°C)…”

“…The mixture was placed in an oven at 70°C for 8 days in the presence of a scandium curing catalyst to accelerate the formation of CÀ OÀ C bonds between the γCPCD and PEG units. 1 H NMR spectra (SI, Figure S6) of soluble fractions in DMSO-d 6 recorded at regular intervals during the curing process revealed that all the PEGDGE cross-linker was consumed. During curing, the sticky, white and mouldable γCPCD gradually changed into a transparent, rubbery material that was no longer mouldable.…”