Can I read Effects of Number-average Molecular Weight of Network Chain on Physical Properties of Cis-polybutadiene-containing Polyurethane on EtoBox?

Effects of Number-average Molecular Weight of Network Chain on Physical Properties of Cis-polybutadiene-containing Polyurethane by Teng Ko Chen; Chii Jen Hwung; Chih Cheng Hou is a Materials Science article available to read on EtoBox.

What is Effects of Number-average Molecular Weight of Network Chain on Physical Properties of Cis-polybutadiene-containing Polyurethane about?

## Abstract Liquid hydroxyl‐terminated cis‐polybutadiene (cis‐HTPB) having various molecular weights were cured with trimethylol propane (TMP) and isophorone diisocyanate (IPDI) by the one‐shot method and the physical properties of these elastomers obtained were measured. The effect of pseudo‐crosslinks was not observable and the calculated value of the number average molecular weight of the network chain (Mc) between each TMP crosslink unit was found to be pertinent in determining the tensile strength, modulus, tear strength, and hardness. The mechanical properties increased with increase in the 1/Mc value and showed a linear relationship with the high 1/Mc values (Mc below about 3000). On the other hand, chain entanglement becomes more important in affecting the mechanical properties when Mc was higher than 3000, and physical properties were less dependent on 1/Mc values in the lower range.

Who reads Effects of Number-average Molecular Weight of Network Chain on Physical Properties of Cis-polybutadiene-containing Polyurethane?

Author

Teng Ko Chen; Chii Jen Hwung; Chih Cheng Hou

Publisher

Society for Plastic Engineers; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0032-3888)

Published

1992

Language

EN

Field

Materials Science (Physical Sciences)