GPC is widely used for measuring the molecular weight distribution of polymers. Some polymers, such as polyethylene (PE) and polypropylene (PP), are insoluble at room temperature. Due to their insolubility at room temperature, a special high-temperature GPC system is required to keep them in solution during molecular weight distribution analysis.

When the high-speed tensile testing machine is used for automotive PP testing: a) the test effect of 1BA spline is relatively good, and it is recommended that S3A spline should not be selected for high-speed tensile test if conditions permit; b) there are shortcomings in the oscillation effect of the three specimens, and the specifications of the high-speed tensile specimens need to be further optimized; c) although the same material is tested, but only the form of the spline is changed, the yield stress obtained by the three spline tests is very different, and the reasons need to be further explored.

This article will provide a detailed technical guide from preliminary preparation to how to conduct more accurate analysis.

When the high-speed tensile testing machine is used for automotive PP testing: a) the test effect of 1BA spline is relatively good, and it is recommended that S3A spline should not be selected for high-speed tensile test if conditions permit; b) there are shortcomings in the oscillation effect of the three specimens, and the specifications of the high-speed tensile specimens need to be further optimized; c) although the same material is tested, but only the form of the spline is changed, the yield stress obtained by the three spline tests is very different, and the reasons need to be further explored.

The National High Material Analysis and Testing Center studied a method that used toluene as a solvent for extraction, and used HPLC and GCMS to qualitatively and quantitatively detect two antioxidants, namely antioxidant AO-60 and antioxidant 2114, respectively.

Given that more and more people are paying attention to the RTI values on UL yellow cards, there is no clear explanation in the market. Today, let's make a brief explanation.

The mechanical behavior of aircraft structures under impact loads requires consideration of the strain rate effect compared to quasi-static loading, that is, as the loading strain rate increases, the material often exhibits a certain strain rate sensitivity.

The "Double 85" reliability test has penetrated into various industries, including electronics and electrical engineering, communication technology, instrumentation, vehicle medical, plastic products, aerospace and other industries.

How do stainless steel, aluminum, copper, plastic, glass, rubber, viscose, composite materials, foam, corrugated paper, wood, fabric, ceramics, etc. commonly used in various industries use material constitutive?

Biodegradable plastics refer to plastics that can be degraded by microorganisms such as bacteria, molds, and algae present in nature under certain conditions, ultimately breaking down into water, carbon dioxide, and other small molecules that enter the natural cycle. In practical applications, it is generally believed that biodegradation into water and carbon dioxide under the action of microorganisms is a more environmentally friendly degradation method.

Electronic devices need to withstand various gas environments in practical applications, such as air, moisture, and harmful gases. Through gas corrosion testing, the durability and long-term stability of materials in different gas environments can be evaluated, providing a scientific basis for material selection and application. At the same time, this testing can also provide a reference for material improvement and optimization.

A well-known electronic enterprise, in order to enhance its new product development and quality management capabilities, had newly purchased a differential scanning calorimeter (DSC). However, due to a lack of technical expertise within the enterprise for managing, testing, and analyzing this equipment, the device was left idle. The enterprise urgently needed professional technical support and training.