Style in Rotterdam Blaak: Why and how has Rotterdam developed such a range of different styles after WWII

El Niño and satellite altimetry: Observation of large-scale waves on the Pacific Ocean

De meest recente El Niño, die van 1997-98, was een van de hevigste gedetecteerde ooit en beïnvloedde het weer op globale schaal. In Zuid-Amerika waren de gevolgen bijna niet te overzien. Hevige regenbuien veroorzaakten onder meer modderstromen, die duizenden huizen vernielde, honderden bruggen en het leven kostte aan maar liefst 2100 mensen....

Dielectric relaxations and thermal diffusivity of side-chain liquid crystalline polymers: A study using dielectric relaxation spectroscopy and thermal wave measurements

Side-chain liquid crystalline polymers consist of side groups which are attached to a polymer backbone with a spacer. The sidegroups contain ridgid molecules, so called mesogenic groups, which give rise to liquid crystalline behaviour. Due to anisotropy in the dipole moment of the mesogenic group, the orientation of these side groups can be...

Characterization of polyacrylamide gels for use as a heat and cold storage material

Polyacrylamide gels with different crosslink densities were studied for the application as a heat storage material. At polymerization the gels contained about 10% polymer and 90% water. Some of the gels showed phase separation and were clouded. The turbidity of the gels increased with crosslink density. The equilibrium shear moduli of the...

Charged Polymer Films for Acoustic Transducers: Literature study

For the creation and to recording of sounds, one needs audio transducers which convert electric energy into acoustic energy and vice versa. For active cancelling of sound or noise, such transducers are needed too. Such acoustic transducers have been studied extensively for consumer goods from the mid 1970’s. These devices are nowadays widely...

De invloed van de morfologie op enkele mechanische eigenschappen van polymeerblends

At present, polymerblends are used more and more instead of pure polymers. The greater part of the polymerblends is immiscible, which results in a certain heterogeneous morphology. This morphology can consist of droplets or fibers of one component in a matrix of the other component, or both components can form continuous phases, the so called co...

Optical determination of thermophoretic velocity

This graduation work describes the design and implementation of an apparatus for direct measurement of thermophoretic velocity. For particles larger than the mean free path of the suspension gas, there are two theories concerning this velocity, presented by Brock (1962) and Derjaguin and Yalamov (1965). To be able to develop promising future...

Superabsorbent polymers: literature study

In this literature study the most important characteristics of superabsorbent polymers are described. Also some attention has been paid to conventional absorbing materials such as nonwovens made of cellulose fibres. First a classification and some examples of hydrogels are given. The swelling behaviour of the gels has been dealt with and also...

Dielectric spectroscopy as a tool for investigating the different states of absorbed water in coatings

Knowledge about the properties of coatings under humid conditions is important for the prediction of the service lifetime of a coating. In this project special attention has been paid to the properties of the water. Using dielectric measurements we have tried to detect the different states of absorbed water. Qualitative and quantitative...

Essay on Protein in Water

Interactions (intramolecular and intermolecular) responsible for the solubility behaviour of the protein will be described to get a better insight in the molecule’s behaviour when environmental conditions, like pH, ionic strength and temperature, are changed....

Reactive Distillation: A literature review of existing applications

The literature on reactive distillation can be divided into two groups. One category approaches the problem from a distillation point of view: can the separation of a mixture with close boiling components be improved by adding a reactive facet to the conventional distillation column ? The second group treats the subject from a reaction...

Aerodynamic drag and geomagnetic perturbations: their modelling and effect on spacecraft dynamics

This study is aimed at the improvement of the modelling of aerodynamic drag, acting on spacecraft. In particular, the fit of the theoretically generated orbit of the GEOS-3 satellite through laser range measurements, obtained by tracking stations all over the world, in various periods of time, is improved. Special attention is paid to the effect...

Capillairreometrie en calorimetrische metingen van de inwendige wrijvingswarmte van polymeersmelten

Met een capillair - extrusie- reometer zijn viscositeitsmetingen gedaan voor " high- densety " polyetheenen, Marlex ( 6O5O en 6OOI ) en Manoleen 6001 en " rigid " P.V.C. . Calorimetrische metingen geven een indruk van de effecten die zich voordoen door de indige frictie»ontstaan bij het persen van polyetheen, Manoleen 6001 door een lang en nauw...