Der einfluß von wasser auf die molekularen beweglichkeiten von polyamiden

Illers, Von K.‐H.

doi:10.1002/macp.1960.020380115

Cited by 119 publications

(19 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A similar process has been detected in a lot of hydrophilic polymers, and is attributed to the molecular motion related to the adsorbed water. [7][8][9][10][11][12] Thus the ␤ process seemed to be due to the motion related to the adsorbed water.…”

Section: Figure 2 Plots Of Logarithmic Frequencies (Log F)mentioning

confidence: 99%

Viscoelastic properties of Japanese lacquer film

Obataya

Umemura

Norimoto

et al. 1999

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

ABSTRACT:The storage modulus (EЈ) and loss modulus (EЉ) of Japanese lacquer films were measured over a temperature range of Ϫ150 to 400°C. Three relaxation processes labeled ␣, ␤, and ␥ were detected at 80, Ϫ60, and Ϫ140°C, and their apparent activation energies (⌬E) were 63-91, 13, and 9 kcal/mol, respectively. These were attributed to the micro-Brownian motions of polymerized urushiol, the molecular motion related to the absorbed water, and the motions of methylene groups in the side chains, respectively. With aging at room temperature, the location of the ␣ peak shifted to higher temperature and its ⌬E value decreased. This result was ascribed to the autoxidative polymerization of urushiol. The EЈ of lacquer films increased with heat treatments at 100°C or above. When treated at temperatures below 200°C, the location of the ␣ peak shifted to higher temperature, with a reduction in the ⌬E value. Heat treatments at 200°C or above resulted in remarkable shrinkage and weight loss of films owing to the pyrolysis of lacquer constituents.

show abstract

Section: Figure 2 Plots Of Logarithmic Frequencies (Log F)mentioning

confidence: 99%

Viscoelastic properties of Japanese lacquer film

Obataya

Umemura

Norimoto

et al. 1999

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

show abstract

“…This action is based on the cleavage of hydrogen bonds between polar groups of adjacent macromolecules [202]. The result is a decrease in the glass-transition temperature of the amorphous regions in the plastic.…”

Section: Water Absorptionmentioning

confidence: 99%

Plastics, Properties and Testing

Stamm

Carlowitz

2000

Ullmann's Encyclopedia of Industrial Chemistry

View full text Add to dashboard Cite

The article contains sections titled: 1. States of Order of Polymers 1.1. Glassy State and Melt 1.2. Crystalline State 1.3. Liquid Crystals 1.4. Blends and Block Copolymers 2. Properties and Testing 2.1. Mechanical Properties and Their Testing 2.1.1. Classification of Plastics Based on Mechanical Properties 2.1.2. Viscoelastic Behavior of Polymers 2.1.3. Mechanics of Deformation 2.1.4. Friction and Wear 2.1.5. Fracture Behavior 2.1.6. Control of Mechanical Properties through Orientation, Internal Stresses, and Morphology 2.1.7. Reinforced and Filled Plastics 2.2. Acoustic Properties and Their Testing 2.3. Thermal Properties and Their Testing 2.3.1. Specific Heat 2.3.2. Thermal Conductivity 2.3.3. Thermal Expansion 2.4. Electrical Properties and Their Testing 2.4.1. Insulating Properties 2.4.2. Dielectric Properties 2.4.3. Dielectric Strength 2.4.4. Electrets; Semiconducting and Conducting Polymers 2.5. Optical Properties and Their Testing 2.5.1. Refraction and Birefringence 2.5.2. Transmittance and Gloss 2.5.3. Color and Colorimetry 2.6. Density and Physical‐Chemical Properties and Their Testing 2.6.1. Density 2.6.2. Liquid Absorption and Swelling; Desorption of Plasticizers 2.6.3. Permeation of Gases and Vapors 2.7. Stability Properties and Their Testing 2.7.1. Water Absorption 2.7.2. Effect of Chemicals 2.7.3. Effects of Heat, Light, and Weathering 2.7.4. Effect of High‐Energy Radiation 2.7.5. Stability against Fire 2.7.6. Effect of Microorganisms 2.8. Processing Properties and Their Testing 2.8.1. Molding Compounds 2.8.2. Conventional Methods for Characterizing Flow Behavior 2.8.3. Rheology of Plastics

show abstract

“…Absorption of water causes the relaxation maxima to be displaced to lower temperatures (Illers, 1960). At the same time, there is generally a decrease of the modulus at higher temperatures.…”

Section: Effect Of Water Absorption and Plasticizingmentioning

confidence: 99%

The torsional oscillation test—an efficient test procedure for characterizing the mechanical properties of plastics

Boden¹

1984

Adv Polym Technol

View full text Add to dashboard Cite

Der einfluß von wasser auf die molekularen beweglichkeiten von polyamiden

Cited by 119 publications

References 24 publications

Viscoelastic properties of Japanese lacquer film

Viscoelastic properties of Japanese lacquer film

Plastics, Properties and Testing

The torsional oscillation test—an efficient test procedure for characterizing the mechanical properties of plastics

Contact Info

Product

Resources

About