Citation: CHEN Lei, YU Xuehai, YANG Changzheng. NOVEL SULPHONATED POLYSILOXANE POLYUREA-URETHANE IONOMERS[J]. Chinese Journal of Polymer Science, ;1996, 14(4): 295-303. shu

NOVEL SULPHONATED POLYSILOXANE POLYUREA-URETHANE IONOMERS

Received Date: 28 February 1995

A series of novel polysiloxane polyurea-urethane blockcopolymers based on methy-lene bis (p-phenylisocyanate (MDI), sodium-s-1, 2-dihydroxy propyl sulphonate (SDPS) andaminopropyl-terminated polydimethylsiloxane (ATPS) was synthesized with varying lengthof soft segments and neutralizing cation. The effect of the chemical composition and thecation on the morphology and mechanical properties of the samples were studied.It was found that the SDPS chain extender based samples have definite chemical struc-ture (-MDI-SDPS-MDI-ATPS-).As the length of the soft segment increases,an improvement of phase separation was observed.In addition,when SO3Na was translated into SO3H or the sulphonic acid groups were neutralized with different charge cations(Na+,Zn2+and Al3+),the morphology and mechanical properties changed greatly.
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