The results of Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed that aPP and poly(octadecyl acrylate) were chemically grafted onto ATP through a graft polymerization reaction. The results of the mechanical properties testing showed that the addition of modified ATP improved
the toughness and strength of PP remarkably. The dynamic mechanical analysis indicated that the modified ATP significantly increased the storage modulus and decreased the glass-transition temperature of PP. The results of scanning electron microscopy BLZ945 molecular weight and transmission electron microscopy showed that the modified ATP was uniformly dispersed into the PP matrix as crystal needles; this proved the presence of strong interactions between modified selleck chemical ATP and PP. The crystal structure analysis revealed that the beta-form crystalline of PP was formed within the modified ATP. (C) 2011 Wiley Periodicals, Inc.
J Appl Polym Sci 121: 899-908, 2011″
“Dissection of epiaortic vessels is a rare event but can have serious clinical consequences such as ischaemic injury to the brain, cerebellum or, more rarely to the retina and is an important cause of stroke in young adults. The main clinical presentation is headache or neck pain, usually but not always associated with Horner syndrome or other local symptoms, followed by an ischemic event in the carotid or vertebral district. Very rarely, the dissection can extend to the intracranial vessels leading to subarachnoid hemorrhage. The time between the headache and the stroke is variable, ranging from a few seconds to weeks. Suspecting an
arterial dissection in cases of unexplained head MK-8931 inhibitor or neck pain in young patients is than crucial to avoid cerebrovascular events; the clinical suspect must be confirmed by ultrasound examination of the epiaortic vessels as a first screening exam, followed by an appropriate neuroimaging study. Treatment with anticoagulants, although not supported by randomized trials, is generally employed to prevent embolic events. The prognosis of stroke caused by arterial dissection does not differ from that of ischaemic events of other origin; the rate of recurrence is low and most patients have only one event in their live. Clinical research with multicenter recruitment is ongoing to provide more solid evidence on the management and prognosis of arterial dissections.”
“Maleic anhydride functionalized acrylonitrile-butadiene-styrene copolymer (ABS-g-MA) was used as an impact modifier of polyamide 6 (PA6). Epoxy resin was introduced into PA6/ABS-g-MA blends to further improve their properties. Notched Izod impact tests showed that the impact strength of PA6/ABS-g-MA could be improved from 253 to 800 J/m with the addition of epoxy resin when the ABS-g-MA content was set at 25 wt %.