Copolymerization of Ethylene and Norbornene via Polymethylene Bridged Dinuclear Constrained Geometry Catalysts
The dinuclear half-sandwich CGCs (constrained geometry catalyst) with a polymethylene bridge, $[Ti({\eta}^5 : {\eta}^1-indenyl)SiMe_2NCMe_3]_2(CH_2)_n]$[n = 6 (1) and 12 (2)], have been employed in the copolymerization of ethylene and norbornene (NBE). To compare the mononuclear metallocene catalyst...
Saved in:
Published in | Macromolecular research Vol. 15; no. 5; pp. 430 - 436 |
---|---|
Main Authors | , , , , , , , |
Format | Journal Article |
Language | Korean |
Published |
2007
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Abstract | The dinuclear half-sandwich CGCs (constrained geometry catalyst) with a polymethylene bridge, $[Ti({\eta}^5 : {\eta}^1-indenyl)SiMe_2NCMe_3]_2(CH_2)_n]$[n = 6 (1) and 12 (2)], have been employed in the copolymerization of ethylene and norbornene (NBE). To compare the mononuclear metallocene catalysts; $Ti({\eta}^5 : {\eta}^1-2-hexylindenyl)SiMe_2NCMe_3$ (3), $(Cp^* SiMe_2NCMe_3)$Ti (Dow CGC) (4) and ansa-$Et(Ind)_2ZrCI_2$ (5), were also studied for the copolymerization of ethylene and NBE. It was found that the activity increased in the order: 1 < 2 < 3 < 5 < 4, indicating that the presence of the bridge between two the CGC units contributed to depressing the polymerization activity of the CGCs. This result strongly suggests that the implication of steric disturbance due to the presence of the bridge may playa significant role in slowing the activity. Dinuclear CGCs have been found to be very efficient for the incorporation of NBE onto the polyethylene backbone. The NBE contents in the copolymers formed ranged from 10 to 42%, depending on the polymerization conditions. Strong chemical shifts were observed at ${\delta}$42.0 and 47.8 of the isotactic alternating NBE sequences, NENEN, in the copolymers with high NBE contents. In addition, a resonance at 47.1 ppm for the sequences of the isolated NBE, EENEE, was observed in the $^{13}C-NMR$ spectra of the copolymers with low NBE contents. The absence of signals for isotactic dyad at 48.1 and 49.1 ppm illustrated there were no isotactic or microblock (NBE-NBE) sequences in the copolymers. This result indicated that the dinuclear CGCs were effective for making randomly distributed ethylene-NBE copolymers. |
---|---|
AbstractList | The dinuclear half-sandwich CGCs (constrained geometry catalyst) with a polymethylene bridge, $[Ti({\eta}^5 : {\eta}^1-indenyl)SiMe_2NCMe_3]_2(CH_2)_n]$[n = 6 (1) and 12 (2)], have been employed in the copolymerization of ethylene and norbornene (NBE). To compare the mononuclear metallocene catalysts; $Ti({\eta}^5 : {\eta}^1-2-hexylindenyl)SiMe_2NCMe_3$ (3), $(Cp^* SiMe_2NCMe_3)$Ti (Dow CGC) (4) and ansa-$Et(Ind)_2ZrCI_2$ (5), were also studied for the copolymerization of ethylene and NBE. It was found that the activity increased in the order: 1 < 2 < 3 < 5 < 4, indicating that the presence of the bridge between two the CGC units contributed to depressing the polymerization activity of the CGCs. This result strongly suggests that the implication of steric disturbance due to the presence of the bridge may playa significant role in slowing the activity. Dinuclear CGCs have been found to be very efficient for the incorporation of NBE onto the polyethylene backbone. The NBE contents in the copolymers formed ranged from 10 to 42%, depending on the polymerization conditions. Strong chemical shifts were observed at ${\delta}$42.0 and 47.8 of the isotactic alternating NBE sequences, NENEN, in the copolymers with high NBE contents. In addition, a resonance at 47.1 ppm for the sequences of the isolated NBE, EENEE, was observed in the $^{13}C-NMR$ spectra of the copolymers with low NBE contents. The absence of signals for isotactic dyad at 48.1 and 49.1 ppm illustrated there were no isotactic or microblock (NBE-NBE) sequences in the copolymers. This result indicated that the dinuclear CGCs were effective for making randomly distributed ethylene-NBE copolymers. |
Author | Kim, Yong-Man Lee, Bae-Wook Noh, Seok-Kyun Lyoo, Won-Seok Zhu, Yin-Bang Jeong, Eung-Yeong Lee, Dong-Ho Kim, Bong-Shik |
Author_xml | – sequence: 1 fullname: Zhu, Yin-Bang – sequence: 2 fullname: Jeong, Eung-Yeong – sequence: 3 fullname: Lee, Bae-Wook – sequence: 4 fullname: Kim, Bong-Shik – sequence: 5 fullname: Noh, Seok-Kyun – sequence: 6 fullname: Lyoo, Won-Seok – sequence: 7 fullname: Lee, Dong-Ho – sequence: 8 fullname: Kim, Yong-Man |
BookMark | eNqNzzFvwjAUBGALgUQK_AcvHSM5McbJ2AZKBRIwsCNDDDzhvodst1L660kR3ZlOd_qWe2FdJLQdluSizFM90bLLkkyVRaqEzPtsFALshZJST4pSJwwrupJrvqyHXxOBkNORz-K5cRYtN1jzFfk9efyrP2D45q7_wbuH-mRrPgX8PjhrPK8IQ_QGsF3nllrqG16ZaFwTYhiy3tG4YEePHLDXj9m2-kwvECLssA5ut3hbrnMhtByrTBVl1h6Rz7obVrBNKw |
ContentType | Journal Article |
DBID | JDI |
DEWEY | 547.7 |
DatabaseName | KoreaScience |
DatabaseTitleList | |
DeliveryMethod | fulltext_linktorsrc |
Discipline | Engineering Chemistry |
DocumentTitleAlternate | Copolymerization of Ethylene and Norbornene via Polymethylene Bridged Dinuclear Constrained Geometry Catalysts |
EISSN | 2092-7673 |
EndPage | 436 |
ExternalDocumentID | JAKO200734515891092 |
GroupedDBID | -EM .UV 06D 0R~ 0VY 1N0 203 2JY 2KG 2VQ 3-Y 30V 4.4 406 408 40D 53G 5GY 67Z 85H 8N- 8UJ 96X 9ZL AAAVM AAFGU AAHNG AAIAL AAJKR AANZL AAPBV AARHV AARTL AATNV AATVU AAUYE AAWCG AAYFA AAYIU AAYQN AAYTO AAZMS ABDZT ABECU ABFGW ABFTV ABJNI ABJOX ABKAS ABKCH ABMQK ABQBU ABSXP ABTEG ABTHY ABTKH ABTMW ABXPI ACBMV ACBRV ACBXY ACBYP ACGFS ACHSB ACIGE ACIPQ ACIWK ACKNC ACMDZ ACMLO ACOKC ACTTH ACVWB ACWMK ADHHG ADHIR ADINQ ADKNI ADKPE ADMDM ADOXG ADRFC ADTPH ADURQ ADYFF ADZKW AEBTG AEFTE AEGNC AEJHL AEJRE AENEX AEOHA AEPYU AESKC AESTI AETCA AEVLU AEVTX AEXYK AFLOW AFNRJ AFQWF AFWTZ AFZKB AGAYW AGDGC AGGBP AGJBK AGMZJ AGQMX AGWZB AGYKE AHAVH AHBYD AHKAY AHSBF AHYZX AIAKS AIIXL AILAN AIMYW AITGF AJBLW AJDOV AJRNO AKQUC ALFXC ALMA_UNASSIGNED_HOLDINGS AMKLP AMXSW AMYLF AMYQR ANMIH AOCGG ASPBG AVWKF AXYYD AYJHY AZFZN BGNMA CAG COF CSCUP DBRKI DDRTE DNIVK DPUIP DU5 EBLON EBS EIOEI EJD ESBYG FERAY FFXSO FIGPU FINBP FNLPD FRRFC FSGXE FYJPI GGCAI GGRSB GJIRD GQ6 GQ7 HF~ HMJXF HRMNR HZ~ I0C IAO IKXTQ IWAJR IXD J-C J0Z JBSCW JDI JZLTJ KOV LLZTM M4Y MZR NPVJJ NQJWS NU0 O9- O9J P9N PT4 R9I RIG RLLFE ROL RSV S1Z S27 S3B SCM SHX SISQX SNE SNPRN SNX SOHCF SOJ SPISZ SQXTU SRMVM SSLCW STPWE T13 TDB TSG U2A UG4 UOJIU UTJUX UZXMN VC2 VFIZW W48 WK8 Z45 Z5O Z7R Z7S Z7U Z7V Z7X Z7Y ZMTXR ZZE ~A9 |
ID | FETCH-kisti_ndsl_JAKO2007345158910923 |
ISSN | 1598-5032 |
IngestDate | Fri Dec 22 12:03:31 EST 2023 |
IsOpenAccess | true |
IsPeerReviewed | true |
IsScholarly | true |
Issue | 5 |
Keywords | microstructure ethylene copolymer norbornene copolymer dinuclear metallocene CGC |
Language | Korean |
LinkModel | OpenURL |
MergedId | FETCHMERGED-kisti_ndsl_JAKO2007345158910923 |
Notes | KISTI1.1003/JNL.JAKO200734515891092 |
OpenAccessLink | http://click.ndsl.kr/servlet/LinkingDetailView?cn=JAKO200734515891092&dbt=JAKO&org_code=O481&site_code=SS1481&service_code=01 |
ParticipantIDs | kisti_ndsl_JAKO200734515891092 |
PublicationCentury | 2000 |
PublicationDate | 2007 |
PublicationDateYYYYMMDD | 2007-01-01 |
PublicationDate_xml | – year: 2007 text: 2007 |
PublicationDecade | 2000 |
PublicationTitle | Macromolecular research |
PublicationTitleAlternate | Macromolecular research |
PublicationYear | 2007 |
SSID | ssib053376897 ssj0061311 |
Score | 3.4501486 |
Snippet | The dinuclear half-sandwich CGCs (constrained geometry catalyst) with a polymethylene bridge, $[Ti({\eta}^5 : {\eta}^1-indenyl)SiMe_2NCMe_3]_2(CH_2)_n]$[n = 6... |
SourceID | kisti |
SourceType | Open Access Repository |
StartPage | 430 |
Title | Copolymerization of Ethylene and Norbornene via Polymethylene Bridged Dinuclear Constrained Geometry Catalysts |
URI | http://click.ndsl.kr/servlet/LinkingDetailView?cn=JAKO200734515891092&dbt=JAKO&org_code=O481&site_code=SS1481&service_code=01 |
Volume | 15 |
hasFullText | 1 |
inHoldings | 1 |
isFullTextHit | |
isPrint | |
link | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwnV3NT8IwFG8MF_VgFDV-kh70ZGr42AY7AkEJBjwIEb2QzrVhwWzJBBP4632v68ogxK_LQptmafZ-vPfr6_sg5ArUXdmv2R4TYD2ZZUn4S_Giz0rS87knSo7LMcG523PaA6sztIfLG12VXTL1bt8WG_NK_iNVmAO5YpbsHyRrXgoT8BvkC0-QMDx_JeMmdjiY453LwjC_Fnx5sCTJrUAvikHGIQ4_A47BbnNsGZ0saKhcLR-0XohFjXmsuneqnhEwey8iWBrPMUcQ65YkFZ9SHtvlKo5Pt9a90SWDjGv5dTxTuj0IWYNr26iiFHUAcAtUDHvB0VpAUIML9pzyfm6aPTdgJXsaB5MVJ0U1q1HdGrOL2okp1Fy56AKtd5IeJkYN2xm42RmdaumLG6FHGypnr1k0E2fYqT884nYqFtC2GjAjF601FhQCzTco11PNA5wXjl2uOao7WIRIVdrVm4ejC_L5IMM9-vtkTx8aaD1BwAHZmkR5st1Me_XlyW6mrOQhCddxQSNJU1xQwAVd4oICLugKLqjGBTW4oBlc0BQX1ODiiFzftfrNNlN7H4X-x_towyepHJNcGIXihFBp-0VXWrxaQjeXC6dZX1qOlGVfurVShZ-SwvfvOvtpwTnZSdzj6MW6ILlpPBOXwOumXkGJ5AsjCFY3 |
link.rule.ids | 230,315,786,790,891,4043 |
linkProvider | Springer Nature |
openUrl | ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Copolymerization+of+Ethylene+and+Norbornene+via+Polymethylene+Bridged+Dinuclear+Constrained+Geometry+Catalysts&rft.jtitle=Macromolecular+research&rft.au=Zhu%2C+Yin-Bang&rft.au=Jeong%2C+Eung-Yeong&rft.au=Lee%2C+Bae-Wook&rft.au=Kim%2C+Bong-Shik&rft.date=2007&rft.issn=1598-5032&rft.eissn=2092-7673&rft.volume=15&rft.issue=5&rft.spage=430&rft.epage=436&rft.externalDBID=n%2Fa&rft.externalDocID=JAKO200734515891092 |
thumbnail_l | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/lc.gif&issn=1598-5032&client=summon |
thumbnail_m | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/mc.gif&issn=1598-5032&client=summon |
thumbnail_s | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/sc.gif&issn=1598-5032&client=summon |