Polymer Blends made from Ionomer and Ionomer Precursor Polymer

1996 ◽  
Vol 461 ◽  
Author(s):  
M. A. Bellinger ◽  
X. Ma ◽  
L. Tsou ◽  
J. A. Sauer ◽  
M. Hara
Keyword(s):  
Methyl Methacrylate ◽  
Polymer Blends ◽  
Interfacial Adhesion ◽  
Composition Range ◽  
Refractive Indices ◽  
Positive Deviation ◽  
Fine Dispersion ◽  
Matrix Polymer ◽  
Precursor Polymer ◽  
The Matrix

ABSTRACTRigid-rigid blends made of an ionomer and an ionomer precursor polymer, based on either polystyrene (PS) or poly(methyl methacrylate)(PMMA), were studied. A positive deviation from the rule of mixtures in both strength and toughness was observed over the entire composition range; and an especially significant enhancement was observed at low ionomer composition (e.g., 10 wt.%). This is attributed to a fine dispersion of the rigid ionomer phase in the matrix polymer together with good interfacial adhesion between the phases. The adhesion arises from entanglements due to athermal interactions between the same monomeric units of both the ionomer and the ionomer precursor. In addition, all the blend samples are found to be transparent due to similar refractive indices of the two components.

Silica-Polymer Core-Shell Particles for Fabrication of Poly(methyl methacrylate) Composite Materials

2012 ◽  
Vol 531 ◽  
pp. 153-156
Author(s):  
Ren Gui Peng ◽  
Cheng En He ◽  
Wei Tang ◽  
Yue E Liu ◽  
Ying Kui Yang
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Composite Materials ◽  
Glass Transition Temperature ◽  
Methyl Methacrylate ◽  
Interfacial Adhesion ◽  
Core Shell ◽  
Poly Methyl Methacrylate ◽  
The Matrix ◽  
Shell Particles

Poly(n-butyl acrylate) grafted silica nanoparticles were compounded with poly(methyl methacrylate) to yield silica/polymer composites with the improved dispersion of silica and interfacial adhesion with the matrix, thus showing increases in storage modulus and glass transition temperature.

Modeling and Simulation of Viscoelastic Behavior of Three-Phase Polymer Blends with Multiple Droplet Morphology

2008 ◽  
Vol 3 (2) ◽  
Author(s):  
Rajinder Pal
Keyword(s):  
Modeling And Simulation ◽  
Polymer Blends ◽  
Viscoelastic Behavior ◽  
Factors Affecting ◽  
Double Emulsions ◽  
Polymeric Liquids ◽  
Matrix Polymer ◽  
Three Phase ◽  
The Matrix ◽  
Droplet Morphology

Three-phase polymer blends with ``multiple droplet" morphology are important industrially. They are referred to as ``double emulsions" as the droplets of these blends themselves contain a number of smaller droplets inside. In this work, the dynamic viscoelastic behavior of double emulsions composed of three immiscible polymeric liquids is modeled. Simulations show that such double emulsions exhibit three relaxation domains due to relaxation of two different interfaces (internal and external) and the matrix polymer. The factors affecting the dynamic viscoelastic behavior of double emulsions composed of three immiscible polymeric liquids are discussed.

Variation of periodic crazing based on polymer blends of an ultra-high and a low molecular weight poly(methyl methacrylate)

2016 ◽  
Vol 134 (1) ◽  
Author(s):  
Keishi Naito ◽  
Akiyoshi Takeno ◽  
Ryota Morifuji ◽  
Toshiaki Miyata ◽  
Minoru Miwa ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Methyl Methacrylate ◽  
Polymer Blends ◽  
Low Molecular Weight ◽  
Poly Methyl Methacrylate

Development of bamboo polymer composites with improved impact resistance

2021 ◽  
pp. 096739112110093
Author(s):  
RM Abhilash ◽  
GS Venkatesh ◽  
Shakti Singh Chauhan
Keyword(s):  
Impact Strength ◽  
Flexural Strength ◽  
Polymer Composites ◽  
Impact Resistance ◽  
Adverse Impact ◽  
Matrix Polymer ◽  
Bamboo Fibre ◽  
The Matrix ◽  
Major Criterion ◽  
Pp Composites

Reinforcing thermoplastic polymers with natural fibres tends to improve tensile and flexural strength but adversely affect elongation and impact strength. This limits the application of such composites where toughness is a major criterion. In the present work, bamboo fibre reinforced polypropylene (PP) composites were prepared with bamboo fibre content varying from 30% to 50% with improved impact resistance. Homopolymer and copolymer PP were used as the matrix polymer and an elastomer was used (10% by wt.) as an additive in the formulation. Copolymer based composites exhibited superior elongation and impact strength as compared to homopolymer based composites. The adverse impact of elastomer on tensile and flexural strength was more pronounced in homopolymer based composites. The study suggested that the properties of the bamboo composites can be tailored to suit different applications by varying reinforcement and elastomer percentage.

Molar volumes and refractivities of highly concentrated solutions of ammonium and potassium thiocyanates in water and dimethylsulphoxide

1988 ◽  
Vol 66 (9) ◽  
pp. 2244-2249 ◽  
Author(s):  
Petr Pacák ◽  
Zdenĕk Kodejš
Keyword(s):  
Composition Range ◽  
Apparent Molar Volumes ◽  
Refractive Indices ◽  
Dilute Solutions ◽  
Concentrated Solutions ◽  
Lorenz Equation ◽  
Molar Volumes ◽  
Solvent Interactions ◽  
Density Measurements ◽  
Concentration Dependences

Densities and refractive indices of highly concentrated solutions of ammonium and potassium thiocyanates in water and dimethylsulphoxide have been measured at 333.2 K in the composition range from xs = 0.01 up to saturated solutions. Molar volumes and apparent molar volumes have been calculated from density measurements and their concentration dependences are discussed. All the systems are volumetrically non-ideal and exhibit negative deviations from additivity. The molar refractivities were calculated from the refractive indices using the Lorentz–Lorenz equation. The refractivity values of individual ions were estimated in infinitely dilute solutions and were used for discussion of ion–solvent interactions.

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