摘要:
Provided herein are methods for preparing a telechelic polymer of formula I wherein R1 is a polyolefin group; R2 and R3 are, independently in each —(CR2R3)— unit, hydrogen or alkyl from 1 to 6 carbons; m is an integer from 2 to 20; RX is a cationic initiator residue; and p is an integer from 1 to 4.
摘要翻译:本文提供了制备式I的遥爪聚合物的方法,其中R 1是聚烯烃基团; R 2和R 3各自独立地为 - (CR 2 R 3) - 单元,氢或1至6个碳的烷基; m为2〜20的整数; RX是阳离子引发剂残基; 并且p是1至4的整数。
摘要:
Provided herein are methods for preparing a telechelic polymer of formula I wherein R1 is a polyolefin group; R2 and R3 are, independently in each —(CR2R3)— unit, hydrogen or alkyl from 1 to 6 carbons; m is an integer from 2 to 20; RX is a cationic initiator residue; and p is an integer from 1 to 4.
摘要翻译:本文提供了制备式I的遥爪聚合物的方法,其中R 1是聚烯烃基团; R 2和R 3各自独立地为 - (CR 2 R 3) - 单元,氢或1至6个碳的烷基; m为2〜20的整数; RX是阳离子引发剂残基; 并且p是1至4的整数。
摘要:
Provided herein are telechelic polymers and methods for producing the same. In some embodiments, provided herein are compounds having the formula and methods for producing the same.
摘要:
Provided herein are telechelic polymers and methods for producing the same. In some embodiments, provided herein are compounds having the formula and methods for producing the same.
摘要:
The present invention is directed to a method for preparing polyolefins containing a high percentage of exo-olefin chain ends. The method involves ionizing a polyolefin containing tert-chloride chain ends and reacting the ionized polyolefin with one or more nitrogen-containing five-membered aromatic ring or one or more hindered secondary or tertiary amines, or mixtures thereof.
摘要:
The present invention is directed to a method for preparing polyolefins containing a high percentage of exo-olefin chain ends. The method involves ionizing a polyolefin containing tert-chloride chain ends and reacting the ionized polyolefin with one or more nitrogen-containing five-membered aromatic ring or one or more hindered secondary or tertiary amines, or mixtures thereof.
摘要:
Disclosed is a method for preparing polyolefins containing vinylidine end groups from quasiliving carbocationically terminated polyolefin polymers by contacting the quasiliving carbocationically terminated polymer with a suitable azole quenching agent and substituted derivatives thereof.
摘要:
Biodegradable poly(ester-anhydrides) designed to display two-stage degradation profiles are described. The presence of the anhydride linkages allows a relatively rapid decrease in molecular weight, the extent of which is governed by the concentration of the anhydride linkages along the chain, followed by possible dissolution and a slower degradation of the remaining oligomers, the rate of which is governed by the composition of the polyester prepolymers. Methods for the preparation of the poly(ester-anhydrides) and their polyester precursors are also described.