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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 structuren n注塑聚合物制品的
4、不足：如内部如内部如内部如内部缩缩孔孔孔孔表面凹陷表面凹陷表面凹陷表面凹陷熔接痕熔接痕熔接痕熔接痕内内内内应应力大力大力大力大翘翘曲曲曲曲变变形等形等形等形等制品性能与理制品性能与理制品性能与理制品性能与理论值论值相差很相差很相差很相差很远远充满矛盾的注塑过程和性能不高的注塑成型制品。Flow fountainCausesNonuniform shear rate在在热流道板上加了两支流道板上加了两支动态保保压活塞，使型腔中物料在剪切活塞，使型腔中物料在剪切力力场中逐中逐渐冻结成型。成型。l动态保压注塑（DPIM）HDPEShish-kebabiPPInterlocking shish-keb
5、abHDPE(5000S)的的拉拉伸伸强度度可可从从提提高高到到，提提高高300。iPP的的拉拉伸伸强度度在在纵横横方方向向上上从从32MPa提高到提高到63MPaZhong-Ming Li, Wei Yang, Shuying Yang, Rui Huang, Ming-Bo Yang. Journal of Materials Science, “Morphology-tensile behavior relationship in injection molded poly(ethylene terephthalate)/polyethylene and polycarbonate/po
6、lyethylene blends (I): skin-core structure”, 2004, 39: 413-432Zhong-Ming Li, Bang-Hu Xie, Shuying Yang, Rui Huang, Ming-Bo Yang. Journal of Materials Science, “Morphology-tensile behavior relationship in injection molded poly(ethylene terephthalate)/polyethylene and polycarbonate/polyethylene, 2004,
7、 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, 289:1004-1011本课题组主要内容将在如下刊物发表一张图片被确定为Journal of Materials Science的封面Ah! Its made from PLASTICS !
