DMA

What Is DMA?

DMA applies a small oscillatory force to a sample and measures the resulting deformation. By analyzing the stress–strain relationship, DMA separates material response into elastic and viscous components, allowing detailed evaluation of mechanical behavior over a wide temperature and frequency range.

DMA is particularly sensitive to molecular motion and transitions that are not easily detected by conventional mechanical tests.

What DMA Measures

DMA provides key mechanical parameters, including:

Storage Modulus (E′) – elastic response and stiffness
Loss Modulus (E″) – viscous response and energy dissipation
Tan Delta (tan δ) – damping behavior and molecular mobility
Glass Transition Temperature (Tg)
Mechanical behavior vs. temperature, frequency, or time

These parameters help correlate material structure with performance.

Why DMA Matters

Viscoelastic behavior strongly influences how materials perform in real applications. DMA helps you:

predict stiffness and damping under dynamic loads
identify glass transition and secondary transitions
compare formulations, grades, or suppliers
evaluate effects of fillers, plasticizers, or reinforcements
assess long-term performance and durability
detect subtle differences missed by static tests

Typical Application Scenarios

Polymers & Elastomers

Glass transition temperature determination
Stiffness and damping comparison between formulations
Evaluation of plasticizer or additive effects

Composites & Reinforced Materials

Fiber or filler reinforcement effectiveness
Temperature-dependent mechanical behavior
Interface and load-transfer evaluation

Quality Control & Supplier Qualification

Batch-to-batch consistency monitoring
Verification of material specifications
Comparison of incoming materials

Product Development & R&D

Material selection for target service temperature ranges
Optimization of formulations and processing conditions
Screening materials for vibration or damping requirements

Failure Analysis

Investigation of unexpected softening or embrittlement
Comparison of “good vs. failed” samples
Correlation of mechanical changes with thermal history or aging

Sample Types

DMA can be performed on:

polymers and elastomers
thermoplastics and thermosets
composite materials
films, sheets, bars, and molded parts

Xinbodi selects appropriate test modes (tension, bending, shear, compression) based on material type and application.

What You Will Receive

Each DMA project is delivered with a clear, structured report designed for engineering and R&D decisions. A typical deliverable includes:

test objective and sample description
test mode, temperature/frequency program, and conditions
storage modulus, loss modulus, and tan δ curves
identified transition temperatures (e.g., Tg)
comparison between samples or conditions
interpretation linked to performance and application requirements
recommendations for formulation, processing, or follow-up testing

Why Choose Xinbodi for DMA?

Experience with a wide range of polymers, elastomers, and composites
Application-driven test design aligned with real service conditions
High sensitivity for detecting subtle mechanical differences
Clear interpretation beyond raw curves and numbers
Support for R&D, QC, and failure investigations
Confidential handling of proprietary materials and data

DMA