Overview
ISO 19935-2:2026 provides a standardized method for measuring the specific heat capacity (cp) of plastics using temperature modulated differential scanning calorimetry (TM-DSC). Developed by the International Organization for Standardization (ISO), this standard ensures consistency in thermal property evaluation, supporting data quality across research, manufacturing, and quality assurance activities. By detailing procedures and requirements for TM-DSC, ISO 19935-2:2026 facilitates reliable determination of cp values critical for thermal data sheets, R&D, and materials comparison.
Key Topics
-
Temperature Modulated DSC Principles:
TM-DSC enhances traditional DSC by superimposing a small and periodic temperature modulation on the standard heating or cooling rate, improving the accuracy and sensitivity of specific heat capacity measurement.
-
Measurement of Specific Heat Capacity (cp):
Specific heat capacity is determined using the amplitude of the modulated heat flow rate and the periodic temperature profile, following defined calibration and calculation procedures.
-
Equipment and Calibration:
The standard specifies requirements for TM-DSC apparatus, temperature modulation capabilities, and calibration routines to ensure measurement integrity.
-
Testing Procedures:
The procedure includes specimen preparation, experimental parameter selection (such as amplitude and frequency), and calculation methods for cp.
-
Result Reporting:
ISO 19935-2:2026 outlines the necessary details for comprehensive test reporting, ensuring traceability and repeatability of results.
Applications
ISO 19935-2:2026 is applicable in a variety of fields related to plastics and polymers, such as:
-
Materials Research and Development:
Enables accurate determination of the thermal properties of new or modified polymer materials, supporting formulation and innovation.
-
Quality Assurance and Process Control:
Utilized for routine checks of raw materials and finished products, ensuring consistency in production and compliance with specifications.
-
Data Sheet and Database Population:
Provides a reliable method for supplying standardized thermal property data, essential for technical datasheets and material databases.
-
Comparative Material Analysis:
Facilitates direct comparison of specific heat capacity among different plastic grades or suppliers, aiding selection for thermal management applications.
-
Thermal Modeling and Simulation:
Supports the input data requirements for thermal simulations in engineering, design, and processing of plastic components.
Related Standards
To ensure comprehensive and harmonized testing approaches, users of ISO 19935-2:2026 may also reference the following standards:
- ISO 19935-1: Plastics - Temperature modulated DSC - Part 1: General principles
- ISO 11357-1: Plastics - Differential scanning calorimetry (DSC) - Part 1: General principles
- ISO 472: Plastics - Vocabulary
- ISO 80000-5: Quantities and units - Part 5: Thermodynamics
These related documents provide foundational terminology, equipment specifications, and general practices to support consistent application of TM-DSC methods for plastic materials.
By following ISO 19935-2:2026, organizations benefit from globally recognized best practices in the thermal analysis of plastics, leading to improved product performance, more reliable quality control, and enhanced material understanding. This international standard is essential for laboratories, manufacturers, and researchers seeking accuracy and reproducibility in specific heat capacity measurement using temperature modulated DSC.