High strength fibers of stereoregular polystyrene

Details High strength fibers of stereoregular polystyrene High strength fibers of stereoregular polystyrene

D - Textiles, Paper

01

F

18/579

D01F 6/22 (2006.01) D01D 5/06 (2006.01) D01F 6/56 (2006.01)

Patent

CA 1335030

The invention is a crystalline fiber comprising syndiotactic polystyrene, or a mixture. Preferably the fiber is a high strength fiber isotactic polystyrene and syndiotactic polystyrene wherein the fiber is monoaxially oriented, has a tensile strength of 10,000 psi or greater, and a modulus of 1,000,000 psi or greater. In another aspect the invention is a process for the preparation of fibers of syndiotactic polystyrene, or a mixture of isotactic polystyrene and syndiotactic polystyrene which comprises: A. contacting syndiotactic polystyrene, or a mixture of isotactic polystyrene and syndiotactic polystyrene with a solvent for the polystyrene at elevated temperatures under conditions such that a homogeneous solution is formed which has sufficient viscosity to be extruded; B. extruding the solution through an orifice to form a fiber at elevated temperatures; C. quenching the fiber by passing the fiber through one or more zones under conditions such that the fiber solidifies; D. removing the solvent for the polystyrene from the fiber; and E. cooling the fiber to ambient temperature. In the embodiment where it is desirable to prepare high strength fibers, the fibers are further exposed to the following process steps: F. heating the fiber to a temperature above the glass transition temperature of the polystyrene; G. redrawing the fiber to elongate the fiber, maximize crystallinity, and induce monoaxial orientation of the polystyrene in the fiber.

605352

Affiliated with

Also associated with

Rating

High strength fibers of stereoregular polystyrene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High strength fibers of stereoregular polystyrene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High strength fibers of stereoregular polystyrene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1167778