Dynamic Viscoelastic Properties of Polypropylene Melts

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Viscoelastic Properties of Polymer Melts from Equilibrium Molecular Dynamics Simulations

Introduction. The dynamics of polymer chains are now generally very well understood in the pioneering frameworks of the Rouse model for short chains, and the reptation model for longer chains.1-5 While these theories yield well-known expressions for the variation of the diffusivity D and viscosity η with the chain length N, an open question is the chain length at which one crosses over from Rou...

متن کامل

Viscoelastic dynamics of confined polymer melts.

The frequency-dependent shear response of an ultrathin polymer melt (polyphenylmethylsiloxane) confined between adsorbing surfaces (parallel plates of mica) is described. The sinusoidal deformations were sufficiently small to give linear response, implying that measurement did not perturb the film structure. A remarkable transition was observed with decreasing thickness. When the film thickness...

متن کامل

Viscoelastic and Dynamic Properties of Soft Liners

The success of a complete denture depends on the fit of the denture, occlusion, esthetics, and other factors. A poorly fitting denture, irritation and other discomforts currently are treated by dentists with the use of tissue conditioners and soft liners.i-3 It is desirable for tissue conditioners to adapt to the oral mucosa as it heals and also to absorb stresses during mastication. Soft liner...

متن کامل

Influence of Heterogeneous Textures of Polypropylene/Ethylene-Propylene-Rubber Blends on Dynamic Viscoelastic Properties in Molten State

Heterogeneous textures due to phase separation in molten polypropylene (PP)/ ethylene-propylene-rubber (EPR) blends were investigated in relation to their dynamic viscoelastic properties. As characteristic to heterogeneous liquids, slow relaxation mechanisms due to the existence of such phases were found for dynamic moduli of PP/EPR blends. These moduli were analyzed by using the linear viscoel...

متن کامل

Static and dynamic properties of large polymer melts in equilibrium.

We present a detailed study of the static and dynamic behaviors of long semiflexible polymer chains in a melt. Starting from previously obtained fully equilibrated high molecular weight polymer melts [G. Zhang et al., ACS Macro Lett. 3, 198 (2014)], we investigate their static and dynamic scaling behaviors as predicted by theory. We find that for semiflexible chains in a melt, results of the me...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)

سال: 1989

ISSN: 0387-1533

DOI: 10.1678/rheology1973.17.1_48