Uniaxial Elongational Viscosities of Ethylene Ionomer / Styrene-co-Methacrylic Acid Blends

昭博, 西岡; 美帆子, 西尾; 昌隆, 杉本; 辰宏, 高橋; 智則, 香田; 進, 池田; 清人, 小山

doi:10.1678/rheology.32.49

Cited by 10 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The void fraction for crystalline rice flour B100 was as little as A similar tendency of the strain softening in uniaxial elongational viscosity measurement has already been reported in the case of immiscible polymer blend systems. [11][12][13] Their conclusions support our proposal that the present blend system is a two phase system between a water mixture and crystalline rice flour B.…”

Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 88%

Effect of Strain Hardening Property on Baking Productivity of Rice Batter

Murakami

Ota

Nishio

et al. 2016

J. Soc. Rheol., Jpn

Self Cite

View full text Add to dashboard Cite

It is known that conventional crystalline rice batter without gluten does not keep high void fraction after fermentation. In this study, the rice batter with amorphous rice flour provided a higher void fraction than that without amorphous rice flour. The void fraction of the rice batter increased with increasing content of amorphous rice flour. The uniaxial elongational property of the batter without amorphous rice flour did not show a strain hardening. On the other hand, addition of amorphous rice flour caused a strain hardening behavior in uniaxial elongational measurement. When amorphous rice flour content exceeded 60 wt%, we observed a strain hardening for the rice batter.

show abstract

Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 88%

Effect of Strain Hardening Property on Baking Productivity of Rice Batter

Murakami

Ota

Nishio

et al. 2016

J. Soc. Rheol., Jpn

Self Cite

View full text Add to dashboard Cite

show abstract

“…(2) Results of uniaxial elongational viscosity reported by Nishio et al 12) . were also reproduced in the present study.…”

Section: Discussionmentioning

confidence: 99%

Strong Attractive Interaction between Ethylene Ionomer and Carboxyl Groups of Styrene-Co-Methacrylic Acid

Takaki

Koda

Haba

et al. 2017

J. Soc. Rheol., Jpn

Self Cite

View full text Add to dashboard Cite

Effects of styrene-co-methacrylic acid (StMAA) on melt viscosity and morphology for ethylene ionomer were studied. In this study, we used poly-(ethylene-co-methacrylic acid) of neutralization degree 54 % with sodium ions (EMAA54Na). Dynamic viscoelasticity of EMAA-54Na/polystyrene(PS) or EMAA-54Na/StMAA blends was evaluated. EMAA54Na/StMAA blends differed from EMAA-54Na/PS blends in rheological property. Zero shear viscosity η 0 of EMAA54Na/StMAA was higher than expected viscosity with increasing contents of StMAA. Furthermore, fall down of the damping function obtained from stress relaxation measurement of EMAA-54Na/StMAA was weaker than that of EMAA54Na. These results indicated strong interaction between EMAA ionomer and carboxyl groups of StMAA. Results of morphological observation and Fourier transform infrared spectroscopy also indicated that the strong interaction is attractive.

show abstract

“…Nishioka et al have reported that intensity of strain hardening for styrene-co-methacrylic acid (StMAA) can be significantly reinforced by blending only a small amount of EMAA-Na ionomer. 19 They concluded that this unexpected phenomenon of this blend system was due to strong interaction between the ionic bonding (-COO-Na) in EMAA-Na ionomers and the non-neutralized acid (-COOH) of StMAA. From this result, we consider that this concept could be applied for modification of the melt rheological properties of low melt strength materials, such as thermoplastic polyester elastomer (TPEE).…”

mentioning

confidence: 95%

“…[16][17][18] However, very few studies on the melt rheological properties of ionomer blend systems have been carried out. 10,19,30,31 The development of methods for the modification of melt rheological properties such as strain hardening under uniaxial elongation is of significant importance for the processability of polymer materials. Nishioka et al have reported that intensity of strain hardening for styrene-co-methacrylic acid (StMAA) can be significantly reinforced by blending only a small amount of EMAA-Na ionomer.…”

mentioning

confidence: 99%

Effect of Blended Ionomers on the Strain Hardening of Polyester-Type Elastomer/Ionomer Blends

et al. 2009

Self Cite

View full text Add to dashboard Cite

A Na-type ionomer based on poly(ethylene-co-methacrylic acid) (EMAA-Na ionomer) was blended with thermoplastic polyester elastomer (TPEE) and the effect on uniaxial elongational viscosity was investigated. To clarify the effect of the degree of neutralization (ND) by the EMAA-Na ionomer on strain hardening of TPEE/ionomer blends system, EMAA-Na ionomers with different NDs were prepared and blended with TPEE above their melting temperature using a twin screw extruder. An unexpected strong strain hardening was observed for a ND above 40% for a TPEE/EMAA-Na blend ratio of 80/ 20 wt %, which corresponds to the critical ND for the formation of ion aggregates. The results can be explained using the acid-cation exchange mechanism proposed by Vanhoorne and Register. It is considered that blending EMAA-Na ionomers is an effective method for the modification of TPEE with respect to the intensity of strain hardening under uniaxial elongation.KEY WORDS: TPEE / Ionomer / Rheology / Ion Aggregates / Uniaxial Elongation / Strain Hardening / Ionomers are polymers that include a small amount of metal ionic salt groups. Poly(ethylene-co-methacrylic acid) (EMAA) neutralized with sodium (Na) cations is widely used in industrial applications, such as golf balls and food packaging film, etc. The structural and mechanical properties of ionomers in both the solid and melt states have been extensively investigated. Ionic groups tend to form ionic aggregates in a hydrophobic polymer matrix.1-5 Dielectric, dynamic mechanical relaxation and melt rheological studies show that the occurrence of microphase separation of ionic aggregates and the hydrocarbon matrix is dependent on the degree of neutralization (ND) of the ionomer. Hirasawa et al. and Tachino et al. suggested that for a EMAA-Na ionomer in the solid state, ionic aggregates were formed when the ND exceeded 35%.6,7 Nishioka et al. reported a rheological investigation for the EMAA-Na ionomer in the melt state that showed ionic aggregates are formed at a ND of approximately 40%. 8 These results indicate that there is a critical ND for the formation of ion aggregates that exists between 35-40%.Many melt rheological studies on EMAA ionomers have been conducted; however, most of these studies were related to EMAA ionomers as a polymer matrix. [8][9][10][11][12][13][14][15] We consider that research of ionomers for the modification of melt rheology should be noted for new applications. To clarify the roll of blended ionomers for the modification of melt rheological properties, especially uniaxial elongational viscosity, is an important field of research for industrial application.Much research has already been carried out regarding the solid state application of ionomers to blend with polymer materials. [16][17][18] However, very few studies on the melt rheological properties of ionomer blend systems have been carried out. 10,19,30,31 The development of methods for the modification of melt rheological properties such as strain hardening under uniaxial elongation is of significant importan...

show abstract

Uniaxial Elongational Viscosities of Ethylene Ionomer / Styrene-co-Methacrylic Acid Blends

Cited by 10 publications

References 17 publications

Effect of Strain Hardening Property on Baking Productivity of Rice Batter

Effect of Strain Hardening Property on Baking Productivity of Rice Batter

Strong Attractive Interaction between Ethylene Ionomer and Carboxyl Groups of Styrene-Co-Methacrylic Acid

Effect of Blended Ionomers on the Strain Hardening of Polyester-Type Elastomer/Ionomer Blends

Contact Info

Product

Resources

About