Ramie yarn was purchased from Hunan Huasheng Dongting
Ramie Textile Co. Ltd., China. Tin (II) octoate (99%), triphenyl phosphite
(TPP), 1,6-hexane diisocyanate (HDI), 4,40-diphenylmethane
diisocyanate (MDI) and isophorone diisocyanate (IPDI) were purchased
by Sinopharm Chemical Reagent Co. Ltd.,
Ramie yarn was purchased from Hunan Huasheng DongtingRamie Textile Co. Ltd., China. Tin (II) octoate (99%), triphenyl phosphite(TPP), 1,6-hexane diisocyanate (HDI), 4,40-diphenylmethanediisocyanate (MDI) and isophorone diisocyanate (IPDI) were purchasedby Sinopharm Chemical Reagent Co. Ltd.,
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