Crosslinked Elastomers: Structure-Property Relationships and Stress-Optical Law.

Area of Science:

• Polymer Science
• Materials Science
• Physical Chemistry

Background:

• Crosslinked elastomers are crucial in various industrial applications.
• Understanding elastomer network properties is key to material performance.
• Characterizing the relationship between crosslinking and material response is essential.

Purpose of the Study:

• To present a combined approach for characterizing crosslinked elastomers.
• To investigate the response of elastomer networks to varying crosslinking levels.
• To validate the correlation between different characterization techniques.

Main Methods:

• Combines macroscopic methods (rheology, mechanical testing, swelling)
• Incorporates advanced techniques like proton multiple-quantum NMR
• Introduces in situ tensile X-ray scattering for stress-induced segmental orientation

Main Results:

• All techniques provide insights into elastomer network response and crosslinking.
• Results from macroscopic, NMR, and X-ray scattering methods show excellent correlation.
• The study validates the stress-optical law in relation to segmental orientation.

Conclusions:

• The combined methodology offers a comprehensive approach to elastomer characterization.
• This versatile method is applicable to diverse elastomer materials, including industrial ones.
• The approach can be extended to study reinforcement effects in filled elastomers.