Mold temperature- and molar mass-dependent structural formation in micro-injection molding of isotactic polypropylene

Evaluating the Injection Moulding of Plastic Parts using In Situ Time-Resolved Small-Angle X-Ray Scattering Techniques

“…There are competing factors of X-Ray transparency, and thermal conductivity together with mechanical strength to withstand the pressure in the mould which is may reach 1600 Bar. There have been relatively few systems reported in the literature and one approach has chosen to reconcile these competing requirements by opting for a metallic mould with xray transparent windows in the form of diamonds [12,13]. This is a well-established approach widely exploited in the design of x-ray cells for high-pressure studies [14].…”

“…When we reviewed the literature, we found few relevant publications, some had employed WAXS techniques [10,11] which have different requirements to SAXS with the moulding of liquid crystal polymers. The most relevant work was on micro-injection moulding and on injection moulding with metal moulds and x-ray transparent diamond windows [12,13]. Diamond windows are widely used in high pressure cells for x-ray scattering [14], but of course they give access to only a small part of the mould cavity.…”

Evaluating the Injection Moulding of Plastic Parts Using In Situ Time-Resolved Small-Angle X-ray Scattering Techniques

“…Some had employed WAXS techniques [ 13 , 14 ], which have different requirements to SAXS to study the moulding of liquid crystal polymers. The most relevant work was on micro-injection moulding employing metal moulds and X-ray transparent diamond windows [ 15 , 16 ]. Diamond windows are widely used in high-pressure cells for X-ray scattering [ 17 ], but of course, they give access to only a small part of the mould cavity.…”

Current Advances and Future Perspectives of Advanced Polymer Processing for Bone and Tissue Engineering: Morphological Control and Applications

“…The performance of polymer materials and device is not only derived from the structural characteristics of the molecular chain, but also strongly depends on the morphology and structure formed by the effect of stress and temperature during processing ( Ho et al, 2012 ; Zhang et al, 2019 ). Advanced polymer processing technology can generate a unique stress and temperature filed with the assistance of special processing equipment and thus enables polymer materials to exhibit excellent properties which are different from conventional processing, exemplified by the helical stress field formed in rotation extrusion ( Pi et al, 2019 ; Sun et al, 2019 ), the ultra-high shear in micro-injection molding ( Jiang et al, 2018 ; Zhao et al, 2022 ) and so on. These materials and device provide a broader toolbox for practical clinical application.…”