b**m
发帖数: 18 | 1 How to use polarized optical microscope to observe spherulites? My boss asked
me to do it and I tried but found nothing. Should I polish the surface? Or
should I use transparent mode of the light source? Then what should be the
thickness of the specimen?
My own field is nothing to do with polymers. Thanks a lot!! |
b***e
发帖数: 115 | 2 比较容易的，一般来说，都可以看到的呀
普通的光源，注意调节光的强度，还有就是焦距
还有注意用偏光，
对于样品，一般我是等样品熔化以后把，盖玻片放上去
压一压，使它哏能够很薄，但是很容易有气泡，要注意
如果还是看不到，可能你的样品本身就很难观察到球晶
要不就是结晶很慢，你等的时间不够
其他的我不知道了
【在 b**m 的大作中提到】
: How to use polarized optical microscope to observe spherulites? My boss asked
: me to do it and I tried but found nothing. Should I polish the surface? Or
: should I use transparent mode of the light source? Then what should be the
: thickness of the specimen?
: My own field is nothing to do with polymers. Thanks a lot!!
|
o****e
发帖数: 1011 | 3
是不是“环带球晶”啊？嘿嘿
那就要知道所研究的原始材料的成型条件，尽量创造近似的微量条件，
一定温度熔融后(恒温或变温)观察形成的(球)晶。
asked
【在 b***e 的大作中提到】
: 比较容易的，一般来说，都可以看到的呀
: 普通的光源，注意调节光的强度，还有就是焦距
: 还有注意用偏光，
: 对于样品，一般我是等样品熔化以后把，盖玻片放上去
: 压一压，使它哏能够很薄，但是很容易有气泡，要注意
: 如果还是看不到，可能你的样品本身就很难观察到球晶
: 要不就是结晶很慢，你等的时间不够
: 其他的我不知道了
|
s*****g
发帖数: 221 | 4 Genarraly, you can see only the easy crystallized polymer
crystal spherulites. If you want to see the perfect
spherulites under POM (it displays as a cross), probably
you need to culture the crystal at optimum temperature.
the thickness of the sample is not very crucial.
my experience, probably 5-30micron(No one would remember
this range.
【在 b**m 的大作中提到】
: How to use polarized optical microscope to observe spherulites? My boss asked
: me to do it and I tried but found nothing. Should I polish the surface? Or
: should I use transparent mode of the light source? Then what should be the
: thickness of the specimen?
: My own field is nothing to do with polymers. Thanks a lot!!
|
b***e
发帖数: 115 | 5 一般来说，就是不用POM用，一般的显微镜也可以看到的。
光源我也搞不太清楚，不过你可以试试transparent。
还有，可能你对你自己样品的结晶条件不是很清楚
可以先做做DSC,然后用非等温结晶温度作为POM上的等温
结晶温度，等上一定的时间
可能可以看到
【在 b**m 的大作中提到】
: How to use polarized optical microscope to observe spherulites? My boss asked
: me to do it and I tried but found nothing. Should I polish the surface? Or
: should I use transparent mode of the light source? Then what should be the
: thickness of the specimen?
: My own field is nothing to do with polymers. Thanks a lot!!
|
