材料加工形态学7-2注塑-形态

1、材料加工形态学7-2注塑-形态Fibrillar crystalsSpherulitesSize of crystalsPhase orientation in multi-phase polymers相形态Shear stress distribution in a moldsurfacesubskinsurfacecoresubskinImmediate zoneImmediate zoneSkin-core structure (1)Schematic of the skin/core structure of injection-moulded parts: (a) non- comp

2、atibilized blend; (b) compatibilized blendS.Fellahi, et al. morphological stability in injection-moulded high-density polyethylene/polyamide-6 blends, Polymer, 1996, 37(13): 2615-2626分散相在皮层是否存在？Where would you gate this part?Weldline 熔接痕Weld line* Source: Weld lineMold FillingGateSolidified partS.Fe

3、llahi, et al. morphological stability in injection-moulded high-density polyethylene/polyamide-6 blends, Polymer, 1996, 37(13): 2615-2626Schematic representation of weldline structure: (a) non- compatibilized blend; (b) compatibilized blendPhase morphology near weldlineSkin-core structureFlow founta

4、inCausesNonuniform shear rate在热流道板上加了两支动态保在热流道板上加了两支动态保压活塞，使型腔中物料在剪切压活塞，使型腔中物料在剪切力场中逐渐冻结成型。力场中逐渐冻结成型。l动态保压注塑（DPIM）HDPEShish-kebabiPPInterlocking shish-kebabHDPE(5000S)的拉伸强度可的拉伸强度可从提高到，提高从提高到，提高300。iPP的拉伸强度在纵横方向上从的拉伸强度在纵横方向上从32MPa提高到提高到63MPaZhong-Ming Li, Wei Yang, Shuying Yang, Rui Huang, Ming-Bo Ya

5、ng. Journal of Materials Science, “Morphology-tensile behavior relationship in injection molded poly(ethylene terephthalate)/polyethylene and polycarbonate/polyethylene blends (I): skin-core structure”, 2004, 39: 413-432Zhong-Ming Li, Bang-Hu Xie, Shuying Yang, Rui Huang, Ming-Bo Yang. Journal of Ma

6、terials Science, “Morphology-tensile behavior relationship in injection molded poly(ethylene terephthalate)/polyethylene and polycarbonate/polyethylene, 2004, 39: 432-443Zhong-Ming Li, Cheng-Guang Huang, Wei Yang, Ming-Bo Yang, Macromolecular Materials and Engineering, “Morphology dependent double yielding in injection molded polycarbonate/polyethylene blend”, 2004