# DSC crystallinity calculations in filled polymers

Canonical: https://woodplasticcomposite.net/guides/dsc-crystallinity-calculations-in-filled-polymers/
Language: en
Updated: 2026-10-15
Version: 1
Review: AI-assisted English editorial draft. Human technical review has not been recorded.

## Summary

Crystallinity calculations for a filled polymer need a clearly stated basis. Normalising a thermal result by total composite mass can lead to a different interpretation from normalising by polymer mass.

## Technical context

The calculation may require an appropriate reference enthalpy and treatment of the relevant thermal events. Uncertainty in polymer fraction also affects the estimate. A neat-polymer convention cannot always be transferred without checking the composite composition.

https://woodplasticcomposite.net/guides/dsc-crystallinity-calculations-in-filled-polymers/#technical-context

## What to measure and document

Document the equation, reference value and mass basis. State the thermal cycle used and any correction applied. Compare materials consistently and retain the underlying traces so the calculation can be reviewed.

https://woodplasticcomposite.net/guides/dsc-crystallinity-calculations-in-filled-polymers/#verification-plan

## Implications for development and specification

Do not equate a higher estimated crystallinity with universally better WPC. The development decision must consider the actual mechanical and processing requirements. Analytical values should support a specific explanation rather than replace finished-product verification.

https://woodplasticcomposite.net/guides/dsc-crystallinity-calculations-in-filled-polymers/#practical-decision

## Related reading and evidence limits

Experimental thermal analysis of defined composite compositions. Use the linked work as related reading. The practical checks above are editorial recommendations, not reported test results or a substitute for product qualification.

https://woodplasticcomposite.net/guides/dsc-crystallinity-calculations-in-filled-polymers/#reading-scope

## Key points

The calculation may require an appropriate reference enthalpy and treatment of the relevant thermal events.
Document the equation, reference value and mass basis.
Do not equate a higher estimated crystallinity with universally better WPC.

## Comparison

Review step | Evidence to retain
Material and geometry | Exact specimen or product identity
Verification | Method, conditions and individual observations
Decision | Approved scope and documented limitations

## What evidence is needed for dSC crystallinity calculations in filled polymers?

Document the equation, reference value and mass basis. State the thermal cycle used and any correction applied. Compare materials consistently and retain the underlying traces so the calculation can be reviewed.

## Sources

1. Thermal properties of WPC with different compositions — https://doi.org/10.3390/ma12060881