Ring-opening polymerization of lactones initiated by diphenylzinc-coinitiator systems (Record no. 44566)
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| fixed length control field | 01685nam a2200253Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625140629.0 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | B-10328 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Ring-opening polymerization of lactones initiated by diphenylzinc-coinitiator systems |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | Polymer International, 42(6), p.1005-1009, 2003 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | Diphenylzinc, alone or in combination with water and butanone as coinitiators, was used as a polymerization initiator system for a variety of lactones at varying temperatures. The resulting data indicate that the course of the polymerization is greatly influenced by the lactone structure, as well as by the molar ratio of coinitiator to diphenylzinc. When used alone, diphenylzinc exhibited high activity as an initiator in ä-valerolactone polymerizations, although it was less efficient when used in the â-butyrolactone and the â-propiolactone polymerizations. Activity in the olymerization of â- lactones was increased by adding small amounts of butanone or water. It was also observed that the diphenylzinc-butanone combination was more effective than the diphenylzinc-water mixture in the polymerizations of â-butyrolactone and â-propiolactone. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | DIPHENYLZINC |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | RING-OPENING POLYMERIZATION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Ä-VALEROLACTONE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Â-LACTONES |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | O-ACYL CLEAVAGE |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Vivas, M. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Mejias, N. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Contreras, J. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/1-nLyewPejF14j4s6YFU38a4JVGDhDp9t/view?usp=drivesdk">https://drive.google.com/file/d/1-nLyewPejF14j4s6YFU38a4JVGDhDp9t/view?usp=drivesdk</a> |
| Public note | Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Clasificación local |
| Koha item type | Documentos solicitados |
| Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-10328 | 25.06.2025 | 25.06.2025 | Documentos solicitados |