Thermal expansion/contraction is less of a mechanical phenomenon and more of a thermodynamic event. Thermal expansion is the result of increased free-volume that arises from the added vibrational (thermal) energy. The more you heat the polymer, the more it vibrates, creating additional free-volume around each molecule, thus expanding the volume of the part.
Inorganic fillers and reinforcements experience the same phenomenon, but to a lesser degree --- about an order of magnitude less than organic polymers. Thus, adding inorganic fillers will reduce the change in volume (or linear dimension) based on its content in the composition --- not through any reinforcing effect.
Also remember, the coefficient of linear expansion is not linear. The coefficient of expansion is fairly constant up to the Glass Transition Temperature (Tg). It changes significantly in the glass transition region and again in the rubbery plateau.
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so itâ€™s critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Download Now
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now