Characterization of a Pearlescent Biaxially Oriented Multilayer Polypropylene Film

Abstract

This study examines the literature of double-skin facade systems over the last decade, and, with the help of tables and graphics, investigates their advantages and disadvantages. Moreover, a detailed comparison is made between double skin façade systems. The results of the study show that the greatest advantage (95%) of double skin facade systems is their provision of natural ventilation. Other advantages are highlighted according to their percentage as follows: An increase in interaction between user and environment because of the high proportion of transparency, support of heat and sound insulation, reduction in heat transmission and solar heat gain coefficient, an increase in thermal comfort, allowance of solar control elements between the two facade spaces, and protection of these elements from external environment conditions. The most commonly accepted disadvantage (72%) is overheating in the air space of the two facades. Other disadvantages are highlighted according to their percentage as follows: Problems related to a decrease in the amount of daylight entering the building, high investment costs, additional maintenance and repair costs, fire, and acoustic problems. In our country, architectural design decisions related to overheating must be taken so as to provide a positive contribution to energy performance and the applicability of these systems.

Composition, Morphology, Optical, Thermal and Mechanical Properties of Yogurt Containers

“…Thus, FTIR spectrum of Container 1 confirmed that it was mainly made of polypropylene. Additionally, the peaks at 1460 and 712 cm -1 indicated the existence of calcium carbonate (CaCO3) in container 1, because these peaks are the characteristic peaks of the CaCO3 [8].…”

Materials Chemistry and Structural Chemistry of Tin Compounds

“…Binding of the HCl by an organotin mercaptide stabilizer 6 The induction period -the axial section on the time coordinate of the dehydrochlorination curveis a common criterion of all heat stabilizers. Normally, within this period, the processing takes place.…”

“…While control and 2.5% organotin stabilizer containing films are transparent, films with 5% organotin stabilizer are opaque white, indicating limited solubility of organotin stabilizer in PVC. 6…”

“…HCl evolution increased with temperature, being more rapid at 160 • C than at 140 • C. The onset times for HCl evolution were 14.3 and 2.5 h at 140 and 160 • C, respectively, for PVC film without di-n-octyltin bis(i-octylthioglycollate) stabilizer. On the other hand, the film with di-n-octyltin bis(isooctylthioglycollate) stabilizer did not evolve HCl in 30.3 h at 140 • C. HCl started to evolve from the films with di-n-octyltin bis(isooctylthioglycollate) stabilizer in 14.3 h at 160 • C 9.…”

“…Scheme 3.3 3. Proposed mechanism of exchange of chloride atoms in PVC by mercaptide groups of organotin stabilizers:6 coordination of allylic chlorine by organotin mercaptide with subsequent rearrangement to a non-allylic structure…”