Influence of adding poly(vinyl alcohol) fibres to poly(methyl methacrylate) matrix on the fracture behaviour of fibrereinforced composites

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Vladimir Pavelka ◽  
Josef Jancar ◽  
Eva Nezbedova
Keyword(s):  
Methyl Methacrylate ◽  
Vinyl Alcohol ◽  
Fibre Composite ◽  
Impact Resistance ◽  
Charpy Impact ◽  
Critical Stress Intensity Factor ◽  
Poly Vinyl Alcohol ◽  
Special Focus ◽  
Poly Methyl Methacrylate ◽  
The Impact

AbstractThis paper reports on the relationship between structure and mechanical properties of poly(methyl methacrylate) (PMMA) reinforced with randomly oriented short poly(vinyl alcohol) (PVA) fibres. Special focus was on the effect of fibre content on the impact resistance of PMMA/PVA composites. Instrumented Charpy impact tests were carried out to characterize the impact resistance of PMMA/PVA composites. Linear elastics fracture mechanics was used to determine the dynamic critical strain energy release rate (GId) and the critical stress intensity factor (KId). Fracture surfaces were observed using scanning electron microscopy (SEM). Dynamic mechanical analysis was carried out to describe the viscoelastic response of the material. Finally, the behaviour of PMMA/PVA composites was interpreted using current short-fibre composite models. It was shown that a small amount of added PVA fibres (0.42 - 1.68 vol.-%) led to an increase of elastic modulus and yield stress under impact conditions. GId was also slightly increased, but KId remained unchanged. Good agreement was found between SEM observations and fracture toughness measured under impact loading.

Glass transition and crystallization of poly(vinyl alcohol)-g-poly(methyl methacrylate) graft copolymers

Polymer ◽  
1994 ◽  
Vol 35 (14) ◽  
pp. 3122-3126 ◽  
Author(s):  
Yingming Yao ◽  
Lizhi Liu ◽  
Hong Li ◽  
Tianru Fang ◽  
Enle Zhou
Keyword(s):  
Glass Transition ◽  
Methyl Methacrylate ◽  
Vinyl Alcohol ◽  
Graft Copolymers ◽  
Poly Vinyl Alcohol ◽  
Poly Methyl Methacrylate

Self-assembly and nanostructure of poly(vinyl alcohol)-graft-poly(methyl methacrylate) amphiphilic nanoparticles

2019 ◽  
Vol 553 ◽  
pp. 512-523 ◽  
Author(s):  
Hen Moshe Halamish ◽  
Jiří Trousil ◽  
Dmytro Rak ◽  
Kenneth D. Knudsen ◽  
Ewa Pavlova ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Self Assembly ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Poly Methyl Methacrylate ◽  
Amphiphilic Nanoparticles

Poly(vinyl alcohol)‐controlled synthesis of monodispersed crosslinked poly(methyl methacrylate) microparticles with significantly improved mechanical properties

2019 ◽  
Vol 68 (7) ◽  
pp. 1315-1321 ◽  
Author(s):  
Yu‐Chen Kao ◽  
Chun‐Hua Chen ◽  
Wha‐Tzong Whang ◽  
Yi‐Chun Chen ◽  
Kai‐Chi Chen
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Controlled Synthesis ◽  
Poly Methyl Methacrylate

scholarly journals Mixed Amphiphilic Polymeric Nanoparticles of Chitosan, Poly(vinyl alcohol) and Poly(methyl methacrylate) for Intranasal Drug Delivery: A Preliminary In Vivo Study

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4496 ◽  
Author(s):  
Inbar Schlachet ◽  
Hen Moshe Halamish ◽  
Alejandro Sosnik
Keyword(s):  
Methyl Methacrylate ◽  
Vinyl Alcohol ◽  
Sodium Tripolyphosphate ◽  
Brain Regions ◽  
Poly Vinyl Alcohol ◽  
Drug Bioavailability ◽  
Poly Methyl Methacrylate ◽  
Target Organs ◽  
The Brain

Intranasal (i.n.) administration became an alternative strategy to bypass the blood–brain barrier and improve drug bioavailability in the brain. The main goal of this work was to preliminarily study the biodistribution of mixed amphiphilic mucoadhesive nanoparticles made of chitosan-g-poly(methyl methacrylate) and poly(vinyl alcohol)-g-poly(methyl methacrylate) and ionotropically crosslinked with sodium tripolyphosphate in the brain after intravenous (i.v.) and i.n. administration to Hsd:ICR mice. After i.v. administration, the highest nanoparticle accumulation was detected in the liver, among other peripheral organs. After i.n. administration of a 10-times smaller nanoparticle dose, the accumulation of the nanoparticles in off-target organs was much lower than after i.v. injection. In particular, the accumulation of the nanoparticles in the liver was 20 times lower than by i.v. When brains were analyzed separately, intravenously administered nanoparticles accumulated mainly in the “top” brain, reaching a maximum after 1 h. Conversely, in i.n. administration, nanoparticles were detected in the “bottom” brain and the head (maximum reached after 2 h) owing to their retention in the nasal mucosa and could serve as a reservoir from which the drug is released and transported to the brain over time. Overall, results indicate that i.n. nanoparticles reach similar brain bioavailability, though with a 10-fold smaller dose, and accumulate in off-target organs to a more limited extent and only after redistribution through the systemic circulation. At the same time, both administration routes seem to lead to differential accumulation in brain regions, and thus, they could be beneficial in the treatment of different medical conditions.

Molecular Modeling on the Binary Blend Compatibility of Poly(vinyl alcohol) and Poly(methyl methacrylate):  An Atomistic Simulation and Thermodynamic Approach

2005 ◽  
Vol 109 (32) ◽  
pp. 15611-15620 ◽  
Author(s):  
Sheetal S. Jawalkar ◽  
Susheelkumar G. Adoor ◽  
Malladi Sairam ◽  
Mallikarjuna N. Nadagouda ◽  
Tejraj M. Aminabhavi
Keyword(s):  
Molecular Modeling ◽  
Methyl Methacrylate ◽  
Vinyl Alcohol ◽  
Atomistic Simulation ◽  
Thermodynamic Approach ◽  
Poly Vinyl Alcohol ◽  
Binary Blend ◽  
Poly Methyl Methacrylate

Mechanical Properties and Structure of Melamine Formaldehyde/Poly(Vinyl Alcohol) Molecular Composites

1989 ◽  
Vol 171 ◽  
Author(s):  
Kecheng Gong ◽  
Xinghua Zhang
Keyword(s):  
Mechanical Properties ◽  
Composite Structure ◽  
Vinyl Alcohol ◽  
Impact Resistance ◽  
Poly Vinyl Alcohol ◽  
Melamine Formaldehyde ◽  
Two Component System ◽  
Transmission Electron ◽  
Molecular Composites ◽  
The Impact

ABSTRACTThe mechanical properties and structure of melamine formaldehyde (MF)/poly(vinyl alcohol) (PVA) composites were studied in this paper. When PVA content was less than a certain value(about 20 weight %), both flexible strength and impact resistance were improved obviously. While the impact resistance improvement remained the previous trend the flexible strength didn't increase so rapidly as before when the PVA content was more than 20%. The morphology and reactivity of the prepolymer powder and the morphology of the finished specimens were investigated by means of microscope, infrared spectrum and transmission electron microscope(TEM). The results indicated that molecular composite structure was formed in this two-component system. The well-distributed PVA in this system was beneficial to the formation of the molecular composite structure. That could explain the effects of PVA on the mechanical properties and showed that the molecular composite structure are favourable for making full use of the macromolecular potentiality.

Sign in / Sign up

Export Citation Format

Share Document