High molecular weight segmented polyurethaneurea (PUU) copolymers based on an aliphatic diisocyanate, bis(4-isocyanatocyclohexyl)methane and mixed hydrophilic and hydrophobic soft segments were prepared.
The use of isopropanol (IPA) as the reaction solvent for the preparation of high molecular weight segmented polyether-urea copolymers based on cycloaliphatic diisocyanates was investigated.
High molecular weight segmented poly ester amide)s were prepared by melt polycondensation of dimethyl adipate, 1,4-butanediol and a symmetrical bisamide-diol based on ε-caprolactone and 1,2-diaminoethane or 1,4-diaminobutane.
High molecular weight segmented poly ester amide)s were prepared by melt polycondensation of 1,4-butanediol, dimethyl adipate and a preformed bisamide-diol based on 1,4-diaminobutane and ε-caprolactone.
High molecular weight segmented silicone urea copolymers were prepared through the reaction of HMDI with aminopropyl and N-methylaminopropyl terminated polydimethylsiloxane (PDMS) oligomers and three different chain extenders, ethylene diamine (ED), hexamethylene diamine (HMDA) and 2-methyl-1,5-diaminopentane (Dytek A).
Influence of soft segment molecular weight and hard segment content on the morphology, thermomechanical and tensile properties of homologous polyurethaneurea copolymers based on narrow molecular weight poly(propylene oxide glycol (PPG) oligomers were investigated.
Paclitaxel-loaded poly ethylene oxide -b-poly(lactide) (PEoxide -b-polyems have been oxide -b-polyssemblactide fiber structures with remarkably different properties using different chirality and molecular weight of PLA segments.
Although the molecular weight of PLL segment was only about 6 kDa, ASL could condense DNA effectively and form about 150 nm spherical nanoparticles at N/P ratio of 15.
A simple theoretical approach based on Rouse modes was developed to explain the orientation dependence of the hard segments on the number average molecular weight of the soft segments.
