Methyl cellulose ??????????????????????

Methylcellulose ???? cellulose methyl ether. ?????????????????????????????????????? particles ??????????, filamentous ???????. ??????????????????, ??????? 27% ?? 32% ??????? hydroxyl ??????????????????????? methoxy. ????????????????????? methyl cellulose ??????????????????????? polymerization, ??????? 50 ?? 1000; ???????????????????????? (??????) ??????? 10000 ?? 22000 Da, ?????????????????????????????????????????????? methoxy ??????, ??????????????????????????? glucose anhydride ??????????????.

?????????????

?????????????????????????

????????

Methylcellulose ???? ether ?????????????????? ionic, ???????????????? etherification ????????????? methyl ????????? cellulose.

??????????2

??????????????????? ??????????

1?, ??????????????:?????????? ???????????? ?????????????, ????????? ??????????????.

2?, ???????????:????? insoluble ?? ethanol, ether, chloroform (1: 1) ???????????????????????? viscous ???????????? suspended. ?? 80-90 oC ???????????????????????????, ???????????????????????????????, ???????????????????????????????????????????????, gel ???????????, ??? undergoes ??????????????????????? gel ?????????????????????????????????????.

3?, ??????????:?????????????????????, ????????, ?????????, ????????????, emulsifying, ??????????????????????????????????, ?????? impermeability ???????. ??????????????????????????????, ?????????????????????????. ?????????????????????? ionic, ?????????????????????? emulsifiers ?????, ???????????????????????????????????????????????????????????????? pH 2-12.

4, ????????????:1.3g/??;???????????????????: 0.25-0.7 g/cm3.

5?, ???????????????????????:190-200oC.

6, ??????????????:225-230oC.

7, ??????????????:47-53 den/cn.

????????????????

??????????????????:

?????????	????????? (55AX Series)
???????	27.0-32.0
???????????	50-55
??????????	≤5
?????????????????????	≤1
????????	≤20
???????????	≤2
??????????	5.0-8.0
????????	???????????????? viscosity

????????????????????????

?????	?????????????	????
????????????	50	40-60
	100	80-120
	400	350-450
viscosity ???	1000	800-1200
	2000	1600-2400
	4000	3500-4500
????????????????	30000	24000-36000
	50000	45000-55000
	75000	70000-80000
	100000	85000-105000