t***m
发帖数: 114 | 1 聚合了这样一个东西
CF2=CF-R-CF=CF2 R=长链，非共扼体系
现在想弄清楚聚合后的结构
是
(CF2-CF)n
.....|
.....R
.....|
.....CF=CF2
还是
..CF2-CF-R
..| |
R-CF--CF2
用啥方法可行？ |
|
C***S
发帖数: 175 | 2 CF3CF=CF2 +H2O2 -->CF2-CF--CF2 + H2O (basic slolution)
\ /
O
CF2-CF--CF2 + R-C=O --> RCF2OCF--C=O
\ / | | |
O F CF3 F
RCF2OCF--C=O +Na2CO3 -->RCF2OCF=CF2 + CO2 +2NaF
| |
CF3 F |
|
J*********n
发帖数: 6974 | 3 CF2那时还没发布呢。
再说，现在Sandisk CF2 120GB你会买么？
价格都快赶上照相机了。 |
|
b**s
发帖数: 589 | 4 Found a paper about perfluoroallylbenzene, but I wonder if it can
copolymerize,be crystalline(irregular molecule chain) or be worthy of doing it
perfluoroallylbenzene 的空间位阻太大，很难通过自由基共聚上，即使共聚上，也会因
为
空间位阻的原因难已结晶，可能根本就没有melting point。
perfluoroallylbenzene (C6F5-CF2-CF=CF2) |
|
C***S
发帖数: 175 | 5 No. I am working on Nafion system, the chemical formula is
((CF2)6.5CF(CF2)6.5)n
|
OCF2CF(CF3)OCF2CF2SO3H
I just read the paper, which claims that even at low level hydration level,
Nafion morphology is composed by polymer aggregates dispersed in water. To me,
this is nonsense. So I checked their original paper. In that paper,
they substitute H+ with N(CH3)4+, and do SANS experiments at different H2O/D2O
ratio. After that, they normlized all the SANS profile with 100% H2O, so t |
|
b*******n
发帖数: 29 | 6 Could you provide the exact paper citation, or tell us more about
the sample composition? Is it one-phase binary system, which is almost
impossible?
By the way, for Nafion ,
((CF2)6.5CF(CF2)6.5)n
|
OCF2CF(CF3)OCF2CF2SO3H
if n is not too large, I believe Nafion can be treated as surfactant.
Then the phase behavior and SANS model have been widely investigated
in the literature.
Good luck.
me,
D2O
they
one |
|
|
f*****9
发帖数: 6768 | 8 A11 Unmarried Amerasian son or daughter of a U.S. citizen born in Cambodia,
Korea, Laos, Thailand, or Vietnam. Sec. 203(a)(1) of the INA and 204(g) as
added by PL-97-359 (Oct. 22, 1982)- ((entered with IV))
A12 Child of an alien classified as A11 or A16. Sec. 203(d) of the INA and
204(g) as added by PL-97-359 (Oct. 22, 1982) – ((entered with IV))
A16 Unmarried Amerasian son or daughter of a U.S. citizen born in Cambodia,
Korea, Laos, Thailand, or Vietnam. Sec. 203(a)(1) of the INA and 204(g) as
... 阅读全帖 |
|
发帖数: 1 | 9 没你说的
Green Card Category Codes
AM1 Amerasian, born in Vietnam/td>
AM2 Spouse/child of AM1 or AM6
AM3 Mother, guardian or relative of AM1 or AM6
AS1 Approved primary asylee
AS2 Spouse of asylee
AS3 Child of asylee
C20 Child of an alien classified as C24 or C29. Conditional.
C21 Spouse of a lawful permanent resident alien (subject to country
limitations). Conditional.
C22 Stepchild (under 21 years of age) of a lawful permanent resident
alien (subject to country limitatio... 阅读全帖 |
|
|
C**E
发帖数: 2573 | 11 然。所言极是。
不管是瑞士的还是德国的“钻石锅”，其实都是换汤不换药。
金刚石，或者钻石，虽然导热好耐划痕，但本身不具有不粘性，表面能高。其实就是和
硬盘里nano-diamond-like-carbon--一种“埃”级平整度的材料--几乎类似，无定形特
征里掺杂含F的类似特氟龙材料，产生CF2和CF3键，降低DLC的总体表面能。
呵呵呵 |
|
C**E
发帖数: 2573 | 12 然。所言极是。
不管是瑞士的还是德国的“钻石锅”，其实都是换汤不换药。
金刚石，或者钻石，虽然导热好耐划痕，但本身不具有不粘性，表面能高。其实就是和
硬盘里nano-diamond-like-carbon--一种“埃”级平整度的材料--几乎类似，无定形特
征里掺杂含F的类似特氟龙材料，产生CF2和CF3键，降低DLC的总体表面能。
呵呵呵 |
|
z**u
发帖数: 1025 | 13 请问这个可以向csp要求赔偿嚒？我看了
https://7bf3245da7fcca65a89d-0e351a966ffa8e80b1497a5cb7701817.ssl.cf2.
rackcdn.com/ChaseSapphireVisa_V0000018_BGC10308_Eng.pdf
第12页，感觉哪条event都不符合呀？如果可以赔偿，请问应该怎么赔偿呢？
补充下具体点的信息：united的航班。我住在一个比较小的城市a，离它比较近的有个
大点的城市b，车程1小时15分钟左右；同样的行程，从b出发机票一般便宜80-200刀不
等。
今天下午3点在newark登机的航班，在2:30被通知因为机械故障取消了。去客服柜台，
客服态度蛮差的，一会说有bus送，一会又说人不够多不行；反反复复了好几次，不同
人说法不一样，一看就是没诚信想发bus。其实大家都愿意坐大巴，大巴大概4小时能回
到A。可有的选择不多，今天最后一般回A的航班是8点多，已经坐满。最后绝大部分人
包括我，选了晚上9点多出发，12点才到B的航班。之后从B如何回到A，united就不管了
。客服态度不好，问compens... 阅读全帖 |
|
b*******9
发帖数: 13548 | 14 【 以下文字转载自 Rite_aid 俱乐部 】
发信人: bactive79 (天南地北), 信区: Rite_aid
标 题: 【79教学帖】Grocery store＋ecoupon
发信站: BBS 未名空间站 (Wed Sep 30 17:30:27 2009, 美东)
3大grocery chains
albertons
http://www.supervalu.com/sv-webapp/index.jsp
Kroger
http://www.thekrogerco.com/index.htm
Safeway
还没找到网页把所有连锁放一起
－－－－－－－－－－－－－－－－－－－－－－－－－
grocery store ecoupon
绝大多数情况，ecoupon可以和mfr 纸张coupon合用，但是也有南加的vons反应了，使用其中一个，另一个就无法使用or出现，纸张的狂beep，or ecoupon不弹出。
原则，可以load到membership卡里面，load一张，对应一次购买，购买完了以后就从卡中就消失了，但是在某一特定时间内，同一个商品的 ecoupon，可... 阅读全帖 |
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w*****3
发帖数: 910 | 15 LIST OF IMMIGRATION CODES THAT MAY BE MENTIONED ON YOUR GREENCARD
C20
Child of an alien classified as C24 or C29 - conditional.
C21
Spouse of a lawful permanent resident alien (subject to country limitations)
- conditional.
C22
Stepchild (under 21 years of age) of a lawful permanent resident alien (
subject to country limitations) - conditional.
C23
Child of an alien classified as C21, C22, C26, or C27 (subject to country
limitations) - conditional.
C24
Unmarried son or daughter (21 years of age... 阅读全帖 |
|
w*****3
发帖数: 910 | 16 LIST OF IMMIGRATION CODES THAT MAY BE MENTIONED ON YOUR GREENCARD
C20
Child of an alien classified as C24 or C29 - conditional.
C21
Spouse of a lawful permanent resident alien (subject to country limitations)
- conditional.
C22
Stepchild (under 21 years of age) of a lawful permanent resident alien (
subject to country limitations) - conditional.
C23
Child of an alien classified as C21, C22, C26, or C27 (subject to country
limitations) - conditional.
C24
Unmarried son or daughter (21 years of age... 阅读全帖 |
|
|
|
R*******d
发帖数: 13640 | 19 Green Card Category Codes
https://secure.ssa.gov/apps10/poms.nsf/lnx/0500502215#C
C20
Child of an alien classified as C24 or C29 - conditional.
C21
Spouse of a lawful permanent resident alien (subject to country limitations)
- conditional.
C22
Stepchild (under 21 years of age) of a lawful permanent resident alien (
subject to country limitations) - conditional.
C23
Child of an alien classified as C21, C22, C26, or C27 (subject to country
limitations) - conditional.
C24
Unmarried son or daughter ... 阅读全帖 |
|
w*l
发帖数: 2550 | 20 C20
Child of an alien classified as C24 or C29 - conditional.
C21
Spouse of a lawful permanent resident alien (subject to country limitations)
- conditional.
C22
Stepchild (under 21 years of age) of a lawful permanent resident alien (
subject to country limitations) - conditional.
C23
Child of an alien classified as C21, C22, C26, or C27 (subject to country
limitations) - conditional.
C24
Unmarried son or daughter (21 years of age or older) who is a stepchild of a
lawful permanent resident alien... 阅读全帖 |
|
i***a
发帖数: 11095 | 21 1 B848.4 CK11-4 1186 高效能人士的七个习惯 ;全译; ( 史蒂芬·柯维著 = The 7
habits of highly effective people ; Stephen R. Cove
2 G645.5 CZ6 915 完美大学必修 = Perfect university education ;两个北大学生的
四; 张锐, 任羽中
3 B848.4 CL37 792 做最好的自己 = Be your personal best ;李开复
4 B84 CG4 739 心理学与生活 ;( 理查德·格里格,菲利普·津巴多; 王垒, 王甦等
5 G645.5 CL1 713 穿过金色光阴的哈佛人 ;哈佛大学生成功访谈录 ; (理查德·莱
Richard J.Light); 范玮
6 G647.38 CB1 610 剪裁人生 ;探寻大学生毕业选择和人生规划之; 北京纽哈斯国际教
育咨询有限公司编
7 R322-64 BG1 565 人体解剖彩色图谱 ;主编郭光 王
8 B821-49 CF2 514 哲学与人;傅佩荣
9 B848.4 CM14 513 终极突破 ; |
|
|
z**u
发帖数: 1025 | 23 【 以下文字转载自 Money 讨论区 】
发信人: zymu (zymu), 信区: Money
标 题: 包子求助：用csp卡买的机票回程飞机因aircraft maintanence取
发信站: BBS 未名空间站 (Thu Sep 4 14:47:39 2014, 美东)
请问这个可以向csp要求赔偿嚒？我看了
https://7bf3245da7fcca65a89d-0e351a966ffa8e80b1497a5cb7701817.ssl.cf2.
rackcdn.com/ChaseSapphireVisa_V0000018_BGC10308_Eng.pdf
第12页，感觉哪条event都不符合呀？如果可以赔偿，请问应该怎么赔偿呢？
补充下具体点的信息：united的航班。我住在一个比较小的城市a，离它比较近的有个
大点的城市b，车程1小时15分钟左右；同样的行程，从b出发机票一般便宜80-200刀不
等。
今天下午3点在newark登机的航班，在2:30被通知因为机械故障取消了。去客服柜台，
客服态度蛮差的，一会说有bus送，一会又说人不够多不行；反反复复了好几次，不同... 阅读全帖 |
|
y*********e
发帖数: 7269 | 24 如果买645D的话，
买K-5II的话，三公主有$250 rebate
c758710.r10.cf2.rackcdn.com/files/rebates/1363016044_PENTAX_K5IIsLENS_
645DLENS_REWARDS_2013_022613_V2_HR.pdf |
|
z******i
发帖数: 1292 | 25 你那么猴急啊？
估计5D4就会用CF2.0卡了。 |
|
s********e
发帖数: 2783 | 26 别比了，拍RAW，1DX只能连拍 40张左右。
其实是CF卡输给了XQD卡。下一代1DX如果不用CF2,是不大可能搬回这一局了。 |
|
e**n
发帖数: 5876 | 27 "现在的水货16-70还是比水货12-35低不少"
ebay上转了一圈, 水货都是700出头的样子, 哪里低不少?
"从景深的角度来说，APS-C的f4和M43的F2.8是一样的"
这个是错误的.f2.8比f4大一档. 如果要APS-Cf2.8和m43的f4一样, aps的面积要比m43
大一倍, 而事实上只是大了60%多. 所以, M43的F2.8的景深比APS-C的f4的要浅差不多
1/3档
另外, 你要是真在意录像防抖, O+的五轴防抖要强的多了 |
|
h**x
发帖数: 628 | 28 A7r2也支援UHS-I， 写卡不过32MB/s左右。
以小日的鸟性，别太指望A9.
Nc的体育机不到A9一半的数据采集，都用了cf2或者Xqd，而A9没用，说明心虚。 |
|
y********e
发帖数: 1027 | 29 请教一下大家，美国哪家公司卖那种实验室做小型聚合反应的，几升的那种反应釜，我
想用CH2=CF2气体单体合成聚偏氟乙烯，多谢！ |
|
y********e
发帖数: 1027 | 30 请教一下大家，美国哪家公司卖那种实验室做小型聚合反应的，几升的那种反应釜，我
想用CH2=CF2气体单体合成聚偏氟乙烯，多谢！ |
|
b**********e
发帖数: 531 | 31 有谁用过zonyl BA 7-8 个CF2末端一个乙醇，这个东西除了MEK Acetone 醇， 还有什
么熔剂能容？acetonitrile 能容马？
试过DMF, DMAc, THF 都不容 |
|
h****z
发帖数: 1996 | 32 单体剩一个H还是每个C上剩1个H？
前者 (CHF-CF2)n
后者 (CH=CH)n
我完全不了解这两种polymer 只是从理论上提个建议 |
|
h****z
发帖数: 1996 | 33 我有个朋友刚买的这个
-(O-CHF-CF2)n-(OCHF)m- |
|
y********e
发帖数: 1027 | 34 请教一下大家，美国哪家公司卖那种实验室做小型聚合反应的，几升的那种反应釜，我
想用CH2=CF2气体单体合成聚偏氟乙烯，多谢！ |
|
v****e
发帖数: 19471 | 35 Financial Calculator:
CF = Cash Flow; F = Frequency
CF0=5K
CF1=5K, F1=4
CF2=6K, F2=5
CF3=7K, F3=5
CF4=8K, F4=5
CF5=9K, F5=5
CF6=10K, F6=5
CF7=11K, F7=5
CF8=12K, F8=1
CF9=-11.8K (-1,200,000 + 12,000 = -1,180,000), F9=1
Compute IRR => IRR=7.4322%
,
purpose
first
of
IRA |
|
w*******y
发帖数: 60932 | 36 General Features:
Hot-Swappable Support, compliant to USB 2.0
Easy to read front panel
LED on/off/working indicator light
Sockets: Memory cards socket x5, USB socket x1
Installs easily to a 3.5" or 5.25" PC Expansion bay. Requires a 5.25"
mounting rack for installation to 5.25" bays
Advanced Features:
All-in-one Type Card Reader
Five (5) Slots
Internal Installation
Interface: USB 2.0
Dimensions: 4.2" x 6.3" x 1.1"
Front Panel Slots
One (1) MS
One (1) CF/MD
One (1) USB 2.0
One (1) SD/MMC
One (1) ... 阅读全帖 |
|
