Distribution of rubber particles in the weld zone of fused filament fabricated acrylonitrile butadiene styrene and the impact on weld strength

Journal Article (Journal Article)

Fused filament fabrication (FFF) is a common additive manufacturing method for polymers that has been widely adopted due to its low cost and ease of use. However, FFF remains limited in high performance applications due to the weak mechanical properties of the welds between printed fibers, including for parts manufactured from acrylonitrile butadiene styrene (ABS). This study uses atomic force microscopy (AFM) to obtain high resolution nanomechanical maps of the distribution of butadiene particles around weld interfaces in FFF-ABS specimens. From quantitative image analysis, a decrease in the average size and density of the polybutadiene particles is observed within a 5–10 µm region across multiple welds. We find that the lack of craze-inducing polybutadiene particles within the weld zone promotes brittle fracture between printed fibers and results in a reduced weld strength as measured by trouser tear experiments. To improve the fracture toughness of FFF-ABS, methods to promote particle migration into the weld region during or after printing could be considered.

Full Text

Duke Authors

Cited Authors

  • Collinson, DW; Kolluru, PV; Von Windheim, N; Brinson, LC

Published Date

  • May 1, 2021

Published In

Volume / Issue

  • 41 /

Electronic International Standard Serial Number (EISSN)

  • 2214-8604

Digital Object Identifier (DOI)

  • 10.1016/j.addma.2021.101964

Citation Source

  • Scopus