Origin of toughness in .beta.-polypropylene: the effect of molecular mobility in the amorphous phase

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F15%3A00440934" target="_blank" >RIV/61389013:_____/15:00440934 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.polymer.2015.01.047" target="_blank" >http://dx.doi.org/10.1016/j.polymer.2015.01.047</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymer.2015.01.047" target="_blank" >10.1016/j.polymer.2015.01.047</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Origin of toughness in .beta.-polypropylene: the effect of molecular mobility in the amorphous phase

Popis výsledku v původním jazyce

This study aims to explore the origin of toughness in ?-phase isotactic polypropylene (i-PP). Samples of commercial-grade i-PP, both neat and nucleated with a specific ?-nucleating agent (N,N-dicyclohexylnaphthalene-2,6-dicarboxamide), were subjected toa combination of structure-sensitive methods and fracture mechanical testing. In addition to common structural characterisation methods, solid-state NMR data were collected to obtain information about the dynamics of the polymer segments as well as the structure. In particular, temperate-induced transformation between the free and constrained amorphous phase was monitored by variable-temperature 13C MAS NMR, whereas T1?(1H) relaxation was used to estimate correlations times of segmental motions. Lower thermodynamic stability of rigid amorphous fraction was found in the ?-crystalline systems. In contrast helical chains in crystalline and constrained amorphous phase were found to be more restrained in the ?-crystalline system. Overall, th

Název v anglickém jazyce

Origin of toughness in .beta.-polypropylene: the effect of molecular mobility in the amorphous phase

Popis výsledku anglicky

This study aims to explore the origin of toughness in ?-phase isotactic polypropylene (i-PP). Samples of commercial-grade i-PP, both neat and nucleated with a specific ?-nucleating agent (N,N-dicyclohexylnaphthalene-2,6-dicarboxamide), were subjected toa combination of structure-sensitive methods and fracture mechanical testing. In addition to common structural characterisation methods, solid-state NMR data were collected to obtain information about the dynamics of the polymer segments as well as the structure. In particular, temperate-induced transformation between the free and constrained amorphous phase was monitored by variable-temperature 13C MAS NMR, whereas T1?(1H) relaxation was used to estimate correlations times of segmental motions. Lower thermodynamic stability of rigid amorphous fraction was found in the ?-crystalline systems. In contrast helical chains in crystalline and constrained amorphous phase were found to be more restrained in the ?-crystalline system. Overall, th

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JI - Kompositní materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/GA13-29009S" target="_blank" >GA13-29009S: Vliv povrchu plniva na molekulární pohyblivost a deformační a lomové chování polymerních kompozitů s termoplastickou matricí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Polymer

ISSN

0032-3861

e-ISSN

—

Svazek periodika

60

Číslo periodika v rámci svazku

9 March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

107-114

Kód UT WoS článku

000351117300014

EID výsledku v databázi Scopus

2-s2.0-84930487388