天然胶乳的常压氢化及产物性能

应用NH4H40（水合腓）/H02/CuSO4催化体系在常压下使天然胶乳氢化制备氢化天然橡胶，结果表明硬脂酸钠、五水硫酸铜、水合腓用量及反应温度对HNR饱和度有显著的影响，当没有外加硬脂酸钠，铜离子与天然橡胶干胶分子链上双键的摩尔数之比为1∶1000，水合腓与干胶分子链上双键的摩尔数之比为1.4∶1，反应温度45℃时，HNR饱和度可达到64.6%。天然橡胶氢化后，其硫化胶力学性能得到改善，耐老化性能显著提高。

Hydrogenation of Natural Rubber Latex under Normal Pressure and Properties of Saturated Rubber

Hyd rogenaton of natural rubber dNR)was made by using N·H0H0。CuSO, system under nom alpressure to hydrogenate NR latex.The reaction tem perature as well s concentations of sodim steanate, copper slate pentahydrate and hydrazine hydrate were found to have a pronounced effecton saturation ofHNR. Hydrogenation of HNR of upto 64.6% was achieved in the absence of sodim stearate but with moar ratios of copper in versus double bond ofNR molecular chain atI:10 000,molar ratios ofhydrazine hydrate versus double bond ofNR molecuharchain at1.4:1 and at the reaction temperatureof45 C.Compared withNR, themechaniral properties ofHNR vulcanzate were im proved and the aging resistance increased d istincty.