Garth Wilkes: Structure-Property Behavior of Segmented Polyurethanes


Structure-Property Behavior of Segmented Polyurethanes and Polyureas Where Microphase Separation is Promoted by “Single Molecule” Hard Segments

Garth L. Wilkes
University Distinguished Professor Emeritus
Department of Chemical Engineering
Virginia Polytechnic Institute and State University
Blacksburg, Virginia


Block and segmented copolymers have played a very important role in the area of thermoplastic elastomers as well as other areas of polymeric material applications including biomaterials. The theory for controlling their microphase separated morphological structure is well developed for the familiar SBS or SIS triblock non-polar systems. However, for polar segmented systems, this theory is much less applicable for a variety of reasons including the molecular dispersity of the segments and the more strongly interactive secondary bonding that generally arises from hydrogen bonding. This lecture will address new segmented systems that demonstrate how strong microphase separation can be promoted through proper choice of molecular symmetry and nature of hydrogen bonding. It will also be shown that by taking this approach, the mechanical behavior of such systems displays some unique features that can be well correlated to their induced microphase morphological texture as observed by AFM.

Speaker Background

Prof. Wilkes received his BS and MS degrees from the New York State College of Forestry at Syracuse. He later obtained an MS in Polymer Science & Engineering and a PhD in Physical Chemistry, both from the at the University of Massachusetts at Amherst. He worked as an Assistant Associate Professor at Princeton University for 8 years and became a Professor at Virginia Tech in 1978. He is now a University Distinguished Professor in the Department of Chemical Engineering and co-director in the Polymer Materials and Interfaces Laboratory . His primary research interests include the structure- property relationships of glassy, elastomeric and semi-crystalline polymers and hybrid organic–inorganic materials.



Friday, January 15


Michael's Restaurant at Shoreline Park Mountain View, CA  94043
Directions  Map


6 PM social hour
7 PM dinner
8 PM lecture





Early Registration - Up to 7 days in advance of deadline



Registration - Up to deadline



After deadline/walk-in (Availability NOT guaranteed)



Lecture-only is free.


We accept cash or checks, but are unable to accept payment by credit card at this time. Payment is taken at the door.  No-shows are responsible for full payment of registration fee.


Please register on the web page or contact:
Len Radzilowski

email: lradzilo -at-
phone: (650) 361-3264

Deadline for registration:

5PM, Thursday January 7 for early registration discount
5PM, Thursday January 14 for registration (or until venue has reached capacity.)

Dinner Selections:

Salmon filet with beurre blanc
Chicken Marsala
Eggplant Parmagiana

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