effect of plasticizer on thermodynamic properties of nylons

effect of plasticizer on thermodynamic properties of nylons

Effect of plasticizer on thermodynamic properties of nylons

Motivated by experiments showing decreasing tensile modulus of nylons with increasing plasticizer content, a model involving the disruption of nylon hydrogen bonding by addition of plasticizer is proposed. This leads to proposed further experiments and suggests a complementary phenomenological analysis that involves the bulk modulus. The surface energy as a function of plasticizer

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(pdf) loss rate of a plasticizer in a nylon matrix calculated

(PDF) Loss rate of a plasticizer in a nylon matrix calculated

a plasticizer on some thermodynamic properties of nylons. 1 The present paper deals with the same class of materials, but its aim is to treat the loss rate of a plasticizer in a nylon

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effects of plasticization on the piezoelectric properties of

Effects of plasticization on the piezoelectric properties of

Nylon 11 films (δ′-form) were plasticized by immersion in 2-ethyl 1,3 hexanediol. Two different kinds of studies were performed. In the first study, poled nylon 11 films were plasticized by immersion in the plasticizer for different lengths of time. The piezoelectric strain constant,d 31, initially increased up to a plasticizer content of ∼ 14% (by weight) and then decreased. The values

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determination of plasticizers efficiency for nylon by

Determination of plasticizers efficiency for nylon by

Four plasticizers were studied: glycerin mono stearate, benzene sulfonamide, methyl 4-hydroxybenzoate (M4HB), and diethylhexyl phthalate. Plasticizers efficiency was determined by calculating cohesive energy density, solubility parameters, free volume and interaction intensities of pristine nylon, and the nylon–plasticizer blends.

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effect of plasticizer and surfactant on the properties of

Effect of plasticizer and surfactant on the properties of

The addition of the plasticizers to the matrices caused an increase in the ε b values, indicating a high impact of these compounds on the mechanical properties of the tested samples. When describing the type of the plasticizer added to the films, it can be seen that the films with sorbitol were more ductile than those with glycerol.

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determination of plasticizers efficiency for nylon by

Determination of plasticizers efficiency for nylon by

Plasticizers efficiency was determined by calculating cohesive energy density, solubility parameters, free volume and interaction intensities of pristine nylon, and the nylon–plasticizer blends.

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the effect of plasticizer selection on properties of blends

The effect of plasticizer selection on properties of blends

Full set of data on mechanical properties are shown in Table 1.Since the reason of testing citric acid as a prospective compatibilizer or surfactant Tween 80 was to see whether the expected effect on the morphology or interfacial interactions would affect the mechanical properties of the blends, we did not prepare neither PBAT nor TPS with the additives if the other component was absent.

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effect of hydrophobic plasticizers on functional properties

Effect of hydrophobic plasticizers on functional properties

The increase of plasticizers (ATB and TB), independently of the type used, for all concentrations of lecithin studied, produced reduction in the value of TS ().For concentration of lecithin of 10. g/100 g of plasticizer, where the largest values of TS were observed, the use of TB was more effective (102.54 MPa) in comparison with the use ATB (84.47 MPa).

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effect of fillers and plasticizers on the performance of

Effect of fillers and plasticizers on the performance of

The effects of various fillers (SRF black, silica, and clay) and plasticizers (dibutyl phthalate and dioctyl phthalate) on the mechanical, dynamic mechanical, and rheological properties and on the heat and oil resistance of the thermoplastic elastomeric reactive blends of nylon‐6 and acrylate rubber (ACM) were investigated.

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determination of plasticizers efficiency for nylon by

Determination of plasticizers efficiency for nylon by

Plasticizers efficiency was determined by calculating cohesive energy density, solubility parameters, free volume and interaction intensities of pristine nylon, and the nylon–plasticizer blends.

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effects of moisture conditioning methods on mechanical

EFFECTS OF MOISTURE CONDITIONING METHODS ON MECHANICAL

behaves like plasticizer, which affects material properties such as strength, stiffness, and ductility. Water also results in deterioration of electrical properties. At 50% RH and 23°C equilibrium moisture content for various nylons, such as PA 6, PA 66, and PA 46, may vary in wide range from 1.2 wt.% to 3.8 wt. % [2-3].

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effects of plasticizers on the structure and properties of

Effects of plasticizers on the structure and properties of

Effect of different plasticizersFor conventional starch-based films, glycerol is the most commonly used plasticizer. In order to further investigate the role of plasticizers on the formation of nanocomposite structure, two different plasticizers (urea and formamide) with amide groups were selected for the preparation of starch–clay

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effect of different plasticizers on the properties of bio

Effect of different plasticizers on the properties of bio

3.1. Effect of plasticizer type 3.1.1. Mechanical properties of bio-based TPE In this section the plasticizer content was 4pph. The tensile properties were the main criterion used to determine the effect of the plasticizer type on the mechanical properties of the present bio-based TPE. The stress-strain curves of TPEs with and without

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the effect of moisture absorption on the physical properties

THE EFFECT OF MOISTURE ABSORPTION ON THE PHYSICAL PROPERTIES

the Tg and mechanical properties of PU SMPs before and after water absorption. Hydrogen bonding has effects on polar groups, such as those contained in dry nylon 6,6. Dry nylon 6,6 (Tg= 50 °C) has a higher glass transition than dry polycaprolactone (Tg= -60 °C) because of its ability to form hydrogen bonds between the carbonyl oxygen and

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the function selection ester plasticizers-r2

The Function Selection Ester Plasticizers-r2

There are four theories that describe the effects of plasticizers: 4,5,6,7 1. Lubricity theory The lubricity theory states that a plasticizer acts as a lubricant between polymer molecules. As a polymer is flexed, it is believed their molecules glide back and forth with the plasticizer, thus providing the gliding planes. The theory assumes the

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migration of the plasticizer in the compatibilized pp/pvb

Migration of the plasticizer in the compatibilized PP/PVB

However, plasticizers can migrate from polymer due to weak interactions between polymeric chains and plasticizer molecules. It causes changes in performance and properties of the system plasticizer migration relies on several factors including chemical structure and concentration of the plasticizer, processing conditions, etc. [25,26,27,28,29,30].

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determination of plasticizers efficiency for nylon by

Determination of plasticizers efficiency for nylon by

Plasticizers efficiency was determined by calculating cohesive energy density, solubility parameters, free volume and interaction intensities of pristine nylon, and the nylon–plasticizer blends.

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nylon 11 (pa) — polyamide 11 - rtp company

NYLON 11 (PA) — POLYAMIDE 11 - RTP Company

This has an effect on processability, dimensional stability and physical properties. Moisture acts as a plasticizer, reducing tensile strength and stiffness and increasing elongation. But, while absorbed moisture reduces many properties, nylon owes part of its toughness to the plasticizing effect of moisture.

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the effect of moisture absorption on the physical properties

THE EFFECT OF MOISTURE ABSORPTION ON THE PHYSICAL PROPERTIES

the Tg and mechanical properties of PU SMPs before and after water absorption. Hydrogen bonding has effects on polar groups, such as those contained in dry nylon 6,6. Dry nylon 6,6 (Tg= 50 °C) has a higher glass transition than dry polycaprolactone (Tg= -60 °C) because of its ability to form hydrogen bonds between the carbonyl oxygen and

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plasticizer - an overview | sciencedirect topics

Plasticizer - an overview | ScienceDirect Topics

Plasticizers may comprise 15–50% of a PVC formulation. By changing type and amount of plasticizer, properties can be tailored to requirements. Increasing plasticizer concentration increases flexibility, decreases tensile strength, and reduces hardness (e.g., Figure 1).

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plasticizer loss in a complex system (polyamide 12): kinetics

Plasticizer loss in a complex system (polyamide 12): Kinetics

The effects of plasticizer loss on the glass transition temperature and mechanical properties were revealed. Abstract Plasticizer migration is a major concern for plasticized polymers because it leads to unwanted changes in mechanical properties and, in many cases, contamination of the environment.

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effects of polyol-based plasticizer types and concentration

Effects of Polyol-Based Plasticizer Types and Concentration

The mechanical properties of the film effect by the thickness, which depends on the preparation method, solid content and drying. In our study, these parameters were kept as same, so thicknesses of all films were almost the same. Thus, just the composition and type of films (plasticizer properties, contents) affected the film property.

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the function selection ester plasticizers-r2

The Function Selection Ester Plasticizers-r2

There are four theories that describe the effects of plasticizers: 4,5,6,7 1. Lubricity theory The lubricity theory states that a plasticizer acts as a lubricant between polymer molecules. As a polymer is flexed, it is believed their molecules glide back and forth with the plasticizer, thus providing the gliding planes. The theory assumes the

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“new line of modifiers for low polarity elastomers and plastics”

“New Line of Modifiers for Low Polarity Elastomers and Plastics”

plasticizer quantity suitable to produce the desired effect. To achieve a high degree of plasticizer compatibility, it is generally necessary that the plasticizer and polymer have approximately the same polarity. Previously, plasticizers were described as solvents of moderately high molecular weight and low volatility.

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