Influence of molecular weight, temperature, and extensional rheology on melt blowing process stability for linear isotactic polypropylene

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F20%3A63526187" target="_blank" >RIV/70883521:28110/20:63526187 - isvavai.cz</a>

Result on the web

<a href="https://aip.scitation.org/doi/abs/10.1063/5.0020773?journalCode=phf" target="_blank" >https://aip.scitation.org/doi/abs/10.1063/5.0020773?journalCode=phf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0020773" target="_blank" >10.1063/5.0020773</a>

Result language

angličtina

Original language name

Influence of molecular weight, temperature, and extensional rheology on melt blowing process stability for linear isotactic polypropylene

Original language description

In this work, three linear isotactic polypropylenes with different weight-average molecular weights, M-w, and comparable polydispersities were used to produce nonwovens by melt blowing technology at two different temperatures, T. The air/polymer flow rate was changed to maintain the same average fiber diameter, resulting in a different broadness of fiber diameter distribution, which was quantified by the coefficient of variation, CV. The elasticity of the material was evaluated by the reptation-mode relaxation time, lambda(1), and the Rouse-mode reorientation time, lambda(2), determined from the deformation rate dependent shear viscosity data. Extensional rheology was evaluated using uniaxial extensional viscosity measured over a very wide range of strain rates (2 x 10(4) s(-1)-2 x 10(6) s(-1)) using entrance pressure drop and Gibson methods. An obtained plateau value of uniaxial extensional viscosity at the highest extensional strain rates, eta(E,infinity) (normalized by the three times zero-shear rate viscosity, eta(0)), and the minimum uniaxial extensional viscosity, eta(E,min), were related to M-w and T using simple equations. It has been found that the stability of fiber production captured by CV depends exclusively on the extensional properties of the polypropylene melts, namely, eta(E,U,)infinity/3 eta(0) and eta(E,U,min). These findings are important especially with regard to the stable production of polymeric nanofibers by melt blowing technology.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics of Fluids

ISSN

1070-6631

e-ISSN

—

Volume of the periodical

32

Issue of the periodical within the volume

8

Country of publishing house

US - UNITED STATES

Number of pages

17

Pages from-to

"083110-1"-"083110-16"

UT code for WoS article

000565260200002

EID of the result in the Scopus database

2-s2.0-85092221567