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PRODID:-//Vrije Universiteit Amsterdam//NONSGML v1.0//EN
NAME:PhD defense 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:20260924T205014
LOCATION:Main building VU, 1105, Auditorium, De Boelelaan, 1081 HV, Amsterdam
SUMMARY:PhD defense 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>Polym
 eric materials, better known as plastics, are being made more and mor
 e complicated at the chemical level. How a plastic is constructed at 
 the molecular level determines the properties of the material, such a
 s its hardness, flexibility and strength. A good example of this is p
 olyethylene. The old-fashioned plastic bags from the supermarket are 
 made of this material and are very weak. But if you build polyethylen
 e in a different way, it can become even stronger than steel.</p><p>I
 f we can better measure and understand the molecular structure of pla
 stics, we can also better link that structure to the final properties
 . However, this requires accurate analysis techniques. My research th
 erefore focused on improving and using these measurement techniques i
 n a smarter way, so that we can better map different physicochemical 
 properties of plastics.</p><p>The research focused on ordinary plasti
 cs 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 t
 his material.</p><p>In addition, a new measurement method was compare
 d with an existing method. The new way appears to provide valuable ad
 ditional information that was previously lacking.</p><p>Finally, a me
 thod has been developed to measure the exact size and electrical surf
 ace charge of the minuscule particles. This knowledge can be widely u
 sed in various fields, such as medicine and the production of coating
 s.</p><p>More information on the <a href="https://hdl.handle.net/1871
 .1/0b069c99-2a1d-4883-b741-f918a18673f8">thesis</a>.</p> </body> </ht
 ml>
DESCRIPTION: Deciphering Distributions: Advancing separation methodolo
 gies for the determination of physicochemical characteristics of poly
 meric materials Polymeric materials, better known as plastics, are be
 ing made more and more complicated at the chemical level. How a plast
 ic 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 polyethylene in a different way, it can become even stronge
 r than steel.If we can better measure and understand the molecular st
 ructure of plastics, we can also better link that structure to the fi
 nal properties. However, this requires accurate analysis techniques. 
 My research therefore focused on improving and using these measuremen
 t techniques in a smarter way, so that we can better map different ph
 ysicochemical properties of plastics.The research focused on ordinary
  plastics and plastic nanoparticles, or very small particles. Some pl
 astics are difficult to dissolve, which makes it difficult to examine
  them. For one type of plastic, a way has been found to accurately an
 alyze this material.In addition, a new measurement method was compare
 d with an existing method. The new way appears to provide valuable ad
 ditional information that was previously lacking.Finally, a method ha
 s been developed to measure the exact size and electrical surface cha
 rge of the minuscule particles. This knowledge can be widely used in 
 various fields, such as medicine and the production of coatings.More 
 information on the <a href="https://hdl.handle.net/1871.1/0b069c99-2a
 1d-4883-b741-f918a18673f8">thesis</a>.
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