Stopping the Bubbles Dance


Announcing the June Dinner Meeting of
The Golden Gate Polymer Forum

" Stopping the Bubbles Dance "
Scott T. Milner, Ph.D.
Exxon Research and Engineering Company

Thursday, June 25, 1998

(see abstract below)

Suraj Indian Restaurant
Redwood City

Social - 6:00 P. M.
Dinner - 7:00 P. M.
Lecture - 8:00 P. M.

Cost: $30, includes Social & Dinner.
No charge to attend lecture only at 8:00 PM.
(but please let us know for headcount purposes)

Dinner Entree Choices:
(Select one when registering)

Bengan Bertha - Eggplant baked with onions
and tomatoes in mild spices
Lamb Karai - Boneless lamb cooked with tomatoes,
onion, bell peppers and mild spices
Tandoori Fish Tikka - Filet of fish marinated in
mild spices, cooked on skewers, served with
onion and bell pepper
Chicken Fry - Stir fried boneless chicken with
mild spices and herbs

Directions to Suraj:
>From 101 north or south, take the Woodside Road Exit,
going west, away from the bay. After approx. 1 mile,
take the exit to go south on El Camino Real. After
crossing two traffic signals, you will find restaurant
the on the right side of the street.
Address: 2550 El Camino Real
Phone: (650) 369-8899

Telephone or Email Reservations:

Nayan Ashar
(408) 435-6099
Clayton Henderson
(650) 361-3870

***** Deadline for reservations is ******
***** 5 PM, Monday, June 22.**************

Once a reservation is made, you are obligated to pay
unless you cancel before the deadline


"Stopping the Bubbles Dance"
Scott T. Milner,
Exxon Research and Engineering Company
Annandale, NJ

Production of polyethylene plastic film by film-blowing uses $10B/year of plastic resin annually worldwide, and provides wrapping for everything from farm-fresh vegetables to disposable diapers. The range of operating parameters for film-blowing equipment is limited by a family of pesky hydrodynamic instabilities of the free-standing molten film flow. These instabilities cause the free-standing film or "bubble" to dance back and forth in a slow, periodic motion (video will be shown) that leads to shape and thickness variations in the final film, making it unusable. I will describe recent efforts, experimental and theoretical, to understand 1) the origin of the instabilities; 2) what changes in the flow properties of the molten polymer would help to suppress the instabilities; and 3) what changes in molecular architecture would help to achieve the desired melt flow behavior.

The speaker is a staff physicist at Exxon Corporate Research, where he has worked since 1989. He was awarded the 1993 Dillon Medal for Polymer Physics by the American Physical Society.

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