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PRODID:-//Vrije Universiteit Amsterdam//NONSGML v1.0//EN
NAME:PhD defence J.D. Kruijswijk
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART:20261021T134500
DTEND:20261021T151500
DTSTAMP:20261021T134500
UID:phd-defense-j-d-kruijswijk@8F96275E-9F55-4B3F-A143-836282E12573
CREATED:20261016T084450
LOCATION:Main building VU, 1105, Auditorium, De Boelelaan, 1081 HV, Amsterdam
SUMMARY:PhD defence J.D. Kruijswijk
X-ALT-DESC;FMTTYPE=text/html: <html> <body> <p><p>Deciphering Distribu
 tions: Advancing separation methodologies for the determination of ph
 ysicochemical characteristics of polymeric materials</p></p> <p>'Poly
 meric materials, better known as plastics, are being made more and mo
 re complicated at the chemical level. How a plastic is constructed at
  the molecular level determines the properties of the material, such 
 as its hardness, flexibility and strength. A good example of this is 
 polyethylene. The old-fashioned plastic bags from the supermarket are
  made of this material and are very weak. But if you build polyethyle
 ne in a different way, it can become even stronger than steel.</p><p>
 If we can better measure and understand the molecular structure of pl
 astics, we can also better link that structure to the final propertie
 s. However, this requires accurate analysis techniques. My research t
 herefore focused on improving and using these measurement techniques 
 in a smarter way, so that we can better map different physicochemical
  properties of plastics.</p><p>The research focused on ordinary plast
 ics and plastic nanoparticles, or very small particles. Some plastics
  are difficult to dissolve, which makes it difficult to examine them.
  For one type of plastic, a way has been found to accurately analyze 
 this material.</p><p>In addition, a new measurement method was compar
 ed with an existing method. The new way appears to provide valuable a
 dditional information that was previously lacking.</p><p>Finally, a m
 ethod has been developed to measure the exact size and electrical sur
 face charge of the minuscule particles. This knowledge can be widely 
 used in various fields, such as medicine and the production of coatin
 gs.'</p><p>More information on the <a href="https://hdl.handle.net/18
 71.1/0b069c99-2a1d-4883-b741-f918a18673f8">thesis</a>.</p> </body> </
 html>
DESCRIPTION: Deciphering Distributions: Advancing separation methodolo
 gies for the determination of physicochemical characteristics of poly
 meric materials 'Polymeric materials, better known as plastics, are b
 eing made more and more complicated at the chemical level. How a plas
 tic is constructed at the molecular level determines the properties o
 f the material, such as its hardness, flexibility and strength. A goo
 d example of this is polyethylene. The old-fashioned plastic bags fro
 m the supermarket are made of this material and are very weak. But if
  you build polyethylene in a different way, it can become even strong
 er than steel.If we can better measure and understand the molecular s
 tructure of plastics, we can also better link that structure to the f
 inal properties. However, this requires accurate analysis techniques.
  My research therefore focused on improving and using these measureme
 nt techniques in a smarter way, so that we can better map different p
 hysicochemical properties of plastics.The research focused on ordinar
 y plastics and plastic nanoparticles, or very small particles. Some p
 lastics are difficult to dissolve, which makes it difficult to examin
 e them. For one type of plastic, a way has been found to accurately a
 nalyze this material.In addition, a new measurement method was compar
 ed with an existing method. The new way appears to provide valuable a
 dditional information that was previously lacking.Finally, a method h
 as been developed to measure the exact size and electrical surface ch
 arge of the minuscule particles. This knowledge can be widely used in
  various fields, such as medicine and the production of coatings.'Mor
 e information on the <a href="https://hdl.handle.net/1871.1/0b069c99-
 2a1d-4883-b741-f918a18673f8">thesis</a>.
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