PREPARATION AND PROPERTIES OF HIGH STRENGTH RODS FROM L-AND D,L-LACTIDE COPOLYMER

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PREPARATION AND PROPERTIES OF HIGH STRENGTH RODS FROM L-AND D,L-LACTIDE COPOLYMER

Papers | Updated：2021-06-21

- PREPARATION AND PROPERTIES OF HIGH STRENGTH RODS FROM L-AND D,L-LACTIDE COPOLYMER
- Vol. 19, Issue 4, Pages: 351-357(2001)
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- Published：20 August 2001
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PREPARATION AND PROPERTIES OF HIGH STRENGTH RODS FROM L-AND D,L-LACTIDE COPOLYMER[J]. 2001, 19(4): 351-357.
DOI：

PREPARATION AND PROPERTIES OF HIGH STRENGTH RODS FROM L-AND D,L-LACTIDE COPOLYMER[J]. 2001, 19(4): 351-357. DOI：

摘要

Starting with the L- and D

L-lactide copolymer (L:DL = 9: 1) [P(L-DL)LA] of Mw = 32.1×104

rods were obtainedthrough a two stage process: (1) melt-extrusion at 155℃

and (2) hot-drawing at 90℃ to various drawing ratios. Themolecular weight of P(L-DL)LA fell to 9.3×104 as a consequence of the production process. The crystallization andmolecular orientation of P(L-DL)LA developed as a result of the hot-drawing. The mechanical strengths of the rods increasewith the drawing ratio. The maximum for tensile strength

bending strength

bending modulus

and shear strngth are 329 MPa

237 MPa

8.8 GPa

and 157 MPa

respectively.

Abstract

Starting with the L- and D

L-lactide copolymer (L:DL = 9: 1) [P(L-DL)LA] of Mw = 32.1×104

rods were obtainedthrough a two stage process: (1) melt-extrusion at 155℃

bending strength

bending modulus

and shear strngth are 329 MPa

237 MPa

8.8 GPa

and 157 MPa

respectively.

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