A microscopic insight into the deformation behavior of semicrystalline polymers: the role of phase transitions.
The deformation behavior of semicrystalline polymers associated with polymorphic transformations under tensile deformation is discussed in the case of syndiotactic polypropylene. We report a phase diagram of this polymer where the regions of stability of the different polymorphic forms are defined as a function of the degree of stereoregularity and deformation. The values of critical strain corresponding to the structural transformations depend on the stereoregularity that affects the relative stability of the involved polymorphic forms and the state of the entangled amorphous phase.
De Rosa
Claudio
C
Dipartimento di Chimica, Università di Napoli Federico II, Monte S. Angelo, Via Cintia 80126 Napoli, Italy. claudio.derosa@unina.it
Auriemma
Finizia
F
Ruiz de Ballesteros
Odda
O
D003460:Crystallization; D036103:Nanotechnology; D044367:Phase Transition; D011126:Polypropylenes / Q000737:chemistry*; D013237:Stereoisomerism; D013696:Temperature; D013718:Tensile Strength; D014961:X-Ray Diffraction
D011126:Polypropylenes