The Effect of endo/exo-Norbornene Isomer Ratio on Poly(norbornene) Optical Density at 193 nm

被引：7
作者：
Chang, Chun [1 ]
Bell, Andrew [1 ]
Shick, Robert A. [1 ]
Seger, Lawrence D. [1 ]
Rhodes, Larry F. [1 ]
Benedikt, George M. [2 ]
机构：
[1] Promerus LLC, Brecksville, OH 44141 USA
[2] Lubrizol Adv Mat, Brecksville, OH 44141 USA
来源：
JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY | 2014年 / 27卷 / 04期
关键词：
Norbornene; transparency; 193; nm; endo; exo; CHAIN TRANSFER; ADDITION POLYMERIZATION; STEREOCHEMISTRY; POLYMERS;
D O I：
10.2494/photopolymer.27.497
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The polymerization of exo-[(norbornenemethoxy)methyl]-1,1,1,3,3,3-hexafluoro-2-propanol (2) using a palladium catalyst gave a significantly higher A, polymer than the endo isomer or the 80/20 mixture of endo/exo-2. To achieve similar M-w higher concentrations of formic acid chain transfer agent was needed for the exo isomer than for the 80/20 mixture. As a result, the optical density at 193 tun of the exo isomer polymer is substantially lower since less olefinic polymer end groups were formed. A subtle interplay between chain transfer mechanisms and propagation rates explains the results obtained. Isomer content in poly(2) does not affect the dissolution rate in TMAH.
引用
收藏
页码：497 / 501
页数：5
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