Events

Description:

Announcing the June Dinner Meeting of
The Golden Gate Polymer Forum

" Stopping the Bubbles Dance "
by
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
nayan_ashar@HP-SanJose-om1.om.hp.com
or
Clayton Henderson
(650) 361-3870
chenders@raychem.com

***** 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

----------------------------------------------------

ABSTRACT
"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.