نتایج جستجو برای: polytrimethylene terephthalate
تعداد نتایج: 7290 فیلتر نتایج به سال:
In the title compound, [Cu(C(8)H(4)O(4))(C(3)H(4)N(2))(2)](n), the Cu(II) atom is four-coordinated by two carboxyl-ate O atoms from two different terephthalate ligands and two N atoms from two imidazole ligands in a slightly distorted square-planar coordination environment. Each terephthalate ligand acts as a bis-monodentate ligand that binds two Cu(II) atoms, thus forming two unique chains ext...
In the title two-dimensional coordination polymer, [Yb(2)(C(8)H(4)O(4))(3)(H(2)O)(6)](n), the unique Yb(III) ion is eight-coordinated in a distorted dodeca-hedral coordination geometry by three water O atoms and five O atoms from carboxyl-ate groups belonging to four different terephthalate ligands. One of the terephthalate ligands is located around an inversion center. The coordination polymer...
Background & objectives: Polyethylene terephthalate (PET) containers have many applications in the food industry. Although there are numerous advantages for PET it also has some disadvantages, one of which is the migration of materials from the container into the material inside. In this study, the effect of two factors of storage time and temperature on the migration rate was evaluated and mod...
Alkyl substituted 4-cyanoresorcinol 1,3-bisbenzoates with terephthalate based rod-like wings show a series of three orthogonal smectic phases SmA-SmAP(R)-SmAP(A).
volatile compounds generated from two types of polymeric laminated films, irradiated by gamma radiation at 8, 10 and 15 kgy, were investigated. activated carbon was used as a dry food simulant to trace the migrating compounds by gas chromatography/mass spectroscopy (gc/ms). the resulting data showed that the polyethylene terephthalate (pet)/polyethylene terephthalate (pet)/linear low density po...
Nowadays polymer nanocomposites have introduced as a new class of food packaging materials due to their enhanced mechanical, thermal, and barrier properties. In this study PET nano composites were prepared by melt blending of poly (ethylene terephthalate) pellets and mica nanoparticles. The morphology of PET/mica nanocomposites was characterized by X-ray diffraction and transmission electron mi...
OBJECTIVE To evaluate the safety and efficacy of polyethylene terephthalate implants in the soft palate to modify disturbing snoring. DESIGN Interventional study, before-after trial. SETTING Referral center, institutional practice, hospitalized care. PATIENTS Twelve consecutive patients with disturbing snoring and an apnea-hypopnea index less than 15 per hour and a body mass index of 30 o...
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