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Immiscible blends of 80 wt% polypropylene (PP) with 20 wt% polyamide (PA) or polycarbonate (PC) were prepared by melt mixing with or without the addition of 5% nanosilica. The nanosilica produced a strong reduction of the disperse phase droplet size, because of its preferential placement at the interface, as demonstrated by TEM. Polarized Light Optical Microscopy (PLOM) showed that adding PA, PC or...
Poly(ε-caprolactone)-grafted cellulose nanowhiskers (extracted from ramie: CNWr) synthesized by ring-opening polymerization of the corresponding lactone [1] were studied as “masterbatches” by melt-blending within its commercial poly(ε-caprolactone) matrix (PCL). For sake of comparison, unmodified CNWr were also dispersed in PCL. The goal of this study consists to evidence the impact of the covalent...
Poly(dimethylsiloxane) (PDMS)/clay nanocomposites have been synthesized using a novel ω-ammonium functionalized oligo-PDMS surfactant (PDMS–N + (CH 3 ) 3 ) and processed in membrane form. In order to relate the clay morphological structure to the degree of dispersion and physical properties of the membrane, the clay ion-exchanged by PDMS–N + (CH 3 ) 3 ...
The thermal degradation of poly(ε-caprolactam) and its copolymers with ε-caprolactone has been studied by high-resolution thermogravimetric analysis (TGA), followed by the analysis of evolved gas via a simultaneous coupling to Fourier transform infrared spectrometry (FTIR) and mass spectrometry (MS). Poly(ε-caprolactam) and poly(ε-caprolactone) polymers are, respectively, degraded at different temperatures,...
The ring opening polymerisation of l,l-lactide using an equimolar complex of 2-ethylhexanoic acid tin(II) salt Sn(Oct)2 and triphenylphosphine P(φ)3 as catalyst shows for the first time a reactivity providing a polymerisation propagation rate fast enough to imagine a continuous single-step reactive extrusion process for bulk polymerisation. The ring opening polymerisation has been realised on a corotating...
Dynamic mechanical properties, structure and morphology of tetraethoxysilane/poly(ε-caprolactone) (TEOS/PCL) hybrid materials have been analysed by dynamic mechanical spectroscopy, small-angle X-ray scattering, transmission electron microscopy, and image analysis. The experimental observations agree with a microscopic phase separation of the two constitutive components: the organic polymer and the...
This paper presents the results of slurry polymerisation of ethylene that has been initiated by an Al/Ti/Mg-alcohol supported catalyst. Special attention has been paid to the effects of hydrogen, catalyst composition and addition of an α-olefin on catalyst efficiency, molecular weight, crystallinity, and physico-mechanical properties of the final polyolefin. The efficiency of this Al/Ti/Mg catalyst,...
A new inorganic-organic hybrid material, known as ceramer, has been prepared by the sol-gel process. α,ω-Hydroxyl poly( -caprolactone) (PCL) has been used as an organic reagent, as such or after conversion of the hydroxyl end-groups into triethoxysilane end-groups. The novelty has to be found in the biocompatibility and biodegradability of the organic constitutive component. Since the hydroxyl...
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