Isothermal Crystallization Kinetics and Melting Behavior of Poly(oxyethylene)-b-poly(oxybutylene)/Poly(oxybutylene) Blends

摘要: Poly(oxyethylene-b-oxybutylene) block copolymers of various chain lengths (EmBn) were blended with poly(oxybutylene) homopolymer (Bh), materials having different segregation strengths and morphologies (lamellae, cylinder, sphere) obtained. The isothermal crystallization kinetics melting behavior the blends studied using differential scanning calorimetry (DSC) synchrotron small-angle X-ray scattering (SAXS), respectively. Two types are identified:  confined occurring at lower temperature Avrami exponent close to 1.0, a strong dependence halftime on smooth change q* in crystallization; breakout higher an much bigger than 1.0 step q*. relative strength χc/χODT has important influence mechanism, is observed > 3 whereas breakou...