Method of preparing high strength and modulus polyvinyl alcohol

Details Method of preparing high strength and modulus polyvinyl alcohol Method of preparing high strength and modulus polyvinyl alcohol

1982-09-30

1984-04-03

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264203, 2642108, 2642905, 525 56, D01F 614

Patent

active

044407114

ABSTRACT:
Polyvinyl alcohol of molecular weight over 500,000 (i.e. 1,500,000 to 2,500,000) is spun as a dilute solution (2-15%) in a relatively non-volatile solvent such as glycerin. The resultant gel fiber is extracted with a volatile solvent such as methanol and dried. Upon stretching at one or more stages during the process, fibers of tenacity above 10 g/denier and modulus above 200 g/denier (e.g. 18 and 450, respectively) are produced.

REFERENCES:
patent: 4344908 (1982-08-01), Smith et al.
patent: 4360488 (1982-11-01), Barham et al.
Zwick et al., Soc. Chem. Ind., London, Monograph No. 30, pp. 188-207, (1968).
Zwick, Applied Polymer Symposia, No. 6, pp. 109-149, (1967).

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