Morphology and Damage Mechanisms of the Transcrystalline Interphase in Polypropylene

“…The type (meaning the actual morphology) and the thickness of the TCL strongly depend on the crystallization conditions [56,58] and even on the MW difference between the fiber and crystallizing melt [38,59]. The mother lamellae, developed first, may lay edge-or flat-on at the reinforcement surface [60]. Reports appeared usually claim about edge-on lamellae structuring with c-axis orientation along the fiber length [61,62].…”

Section: Interface/-phasementioning

confidence: 99%

Single-polymer composites (SPCs): Status and future trends

Karger‐Kocsis

Bárány

2014

Composites Science and Technology

137

113

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“…This indicates that the PET fibers formed in situ in the PP matrix may nucleate and induce a crystalline morphology at their surface: the TC structure, which is different from that in the PP bulk. This phenomenon has been observed in the glass fiber, [17] carbon fiber, [18,19] aramid (Kevlar) fiber, [19] reinforced PP composites and PE/PE self-reinforced composites, [20] etc.…”

Section: Resultsmentioning

confidence: 97%

In‐Situ Fiberized Poly(ethylene terephthalate) as a Reinforcement to Poly(propylene) Matrix

Shen

Huang

Sheng-wu

2003

Macro Materials & Eng

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The reinforced poly(propylene) (PP)/poly(ethylene terephthalate) (PET) in‐situ fiberized composites were prepared by extrusion‐drawing‐injection molding. The influences of PET weight fraction (fw) on the PET fiberization, phase morphology, and mechanical properties of the composites, together with their functional mechanisms were studied by contrast to the normal‐blended materials without drawing. The results show that as the fw rises from 0 to 20%, the number of PET fibers increases, whereas their diameter and dispersity decrease till fw = 15% and then increase, and the number of remained PET particles tends to rise. These changes of PET fiberization and phase morphology with fw were attributed to the consequence of the combined actions of breakup, coalescence, and deformation of the PET dispersed phase in the PP matrix during the extrusion drawing. Correspondingly, the tensile strength (σt) and Young's modulus (E) of the in‐situ composites increase till fw = 15% and then decrease, with maximum gains of σt and E of about 20 and 70% relative to the neat PP, respectively. This σt/fw relation was ascribed to the counterbalanced result between the reinforcing effect of the dispersed phase on matrix and the interfacial flaw effect of two immiscible phases, while the E/fw relation was considered as a representation of the rigidizing effect of the fibers on the matrix being controlled by both their number and diameter.In‐situ PET fibres (PET/PP = 85/15) in an as‐drawn filament.magnified imageIn‐situ PET fibres (PET/PP = 85/15) in an as‐drawn filament.

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Morphology and Damage Mechanisms of the Transcrystalline Interphase in Polypropylene

Cited by 24 publications

References 10 publications

Highly resolved transmission infrared microscopy in polymer science

Highly resolved transmission infrared microscopy in polymer science

Single-polymer composites (SPCs): Status and future trends

In‐Situ Fiberized Poly(ethylene terephthalate) as a Reinforcement to Poly(propylene) Matrix

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