d*****h
发帖数: 1892 | 1 How many kinds of methods to distinguish between the polymer blend of A and
B and block copolymer of A and B? I searched in this board, but only find a
poster with rough comments.Thanks a lot for your help in advance! |
y****o
发帖数: 4 | 2 GPC
DSC
depending on your polymer.
and
a
【在 d*****h 的大作中提到】
: How many kinds of methods to distinguish between the polymer blend of A and
: B and block copolymer of A and B? I searched in this board, but only find a
: poster with rough comments.Thanks a lot for your help in advance!
|
a*i
发帖数: 1652 | 3 yes, depending on specific cases.
NMR, solubility, morphology...
【在 y****o 的大作中提到】
: GPC
: DSC
: depending on your polymer.
:
: and
: a
|
D********g
发帖数: 533 | 4 我想楼主的意思可能是单单从相区结构上去判断什么是共聚物什么是共混物
个人看法 单单从相区结构上来看，很难区分。不过共聚物有一个很明显的lamella
cylinder sphere这样的roughly的演化过程 而blend得话就没有明显规律了，一般要么
是双连续相要么是分散相。所以从一系列不同组成的相区结构上应该能有所区分。
还有就是注意相区尺寸的观测方法，光学显微镜都是2D的cross-section切面，所以有
可能把柱状相观测成层状相。所以正如楼上几位所说 加上其他手段，GPC如果明显有两
个分子量峰，应该就是blend（前提单分散性好）。DSC如果有两个Tg，这个到只能是
blend的必要条件而不是充分条件，因为block copolymer也有两个Tg的可能。
and
a
【在 d*****h 的大作中提到】
: How many kinds of methods to distinguish between the polymer blend of A and
: B and block copolymer of A and B? I searched in this board, but only find a
: poster with rough comments.Thanks a lot for your help in advance!
|
w********h
发帖数: 12367 | 5 精华区---〉高分子物理---〉如何分辨。。。。
and
a
【在 d*****h 的大作中提到】
: How many kinds of methods to distinguish between the polymer blend of A and
: B and block copolymer of A and B? I searched in this board, but only find a
: poster with rough comments.Thanks a lot for your help in advance!
|
p******4
发帖数: 38 | 6 Chemically, in MS, specially MALDI-TOF MS, you will see two or multiple
series of peaks for polymer blends, but only one series for block copolymers
. |
H*****y
发帖数: 9 | 7 MALDI-TOF MS 对分子量比较高的polymer也容易分辨吗?
copolymers
【在 p******4 的大作中提到】
: Chemically, in MS, specially MALDI-TOF MS, you will see two or multiple
: series of peaks for polymer blends, but only one series for block copolymers
: .
|
p******4
发帖数: 38 | 8 How high do you mean? If the polymer is narrowly polydispersed, around 10K
is OK. |
v******y
发帖数: 155 | 9 GPC
and
a
【在 d*****h 的大作中提到】
: How many kinds of methods to distinguish between the polymer blend of A and
: B and block copolymer of A and B? I searched in this board, but only find a
: poster with rough comments.Thanks a lot for your help in advance!
|
