Preparation of Polar Ethylene–Norbornene Copolymers by Metallocene Terpolymerization with Triisobutylaluminium‐Protected But‐3‐en‐1‐ol

Li, Shaojie; Yao, Zhen; Cao, Kun; Li, Bo‐Geng; Zhu, Shiping

doi:10.1002/marc.200800702

Cited by 31 publications

(15 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The preparation of the E‐NB copolymer and E‐NB‐P terpolymer samples used in this work had been reported in literature 21–24. The composition, molecular weight, and PDI data were cited from the sources.…”

Section: Methodsmentioning

confidence: 99%

Influence of chain microstructure on ethylene–norbornene copolymer film properties

Yao

Chen

et al. 2011

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

The effects of copolymer composition, copolymer composition distribution, and polar a-olefin incorporation on transparency, refractive index, and hydrophilicity of resultant ethylene-norbornene copolymer films were investigated. It has been found that the transparency is mainly determined by the copolymer composition distribution. The samples having uniform compositions gave better transparency. However, the copolymer composition distribution had little effect on refractive index. The refractive index increased linearly with increasing norbornene content. Furthermore, the incorporation of polar a-olefin with long carbon chain improved refractive index and hydrophilicity of the films.

show abstract

Section: Methodsmentioning

confidence: 99%

Influence of chain microstructure on ethylene–norbornene copolymer film properties

Yao

Chen

et al. 2011

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…In 1989, Kaminsky developed a process of synthesis using metallocene catalysts, in particular zirconocene and half-sandwich titanium methylaluminoxane (MAO) catalysts [47][48][49][50], allowing the development of a perfectly transparent material with a great rigidity, which was in the centre of several research efforts [35,[51][52][53][54][55][56][57][58][59][60]. Among the commercial COC, norbornene (or Bicyclo[2.2.1]hept-2-ene), 1, 3-dicyclopentadiene and 5-vinyl-2-norbornene can be found as cyclic olefins.…”

Section: Cyclic Olefin Copolymers (Coc) Development Of Cyclic Olefin mentioning

confidence: 99%

Physico-chemical ageing of ethylene–norbornene copolymers: a review

et al. 2017

View full text Add to dashboard Cite

The main object of this report is to review and summarize the current state of the scientific literature relating to physico-chemical ageing of ethylene-norbornene copolymers (ENCs). These processes occur through different means such as photodegradation under the effect of ultraviolet radiation, temperature and ionizing radiation (under air or oxygen). In most cases ageing causes chains scissions that lead to the creation of degradation compounds that exhibit high mobility, corresponding to their low molecular weight and/or high polarity. Cross-linking can also occur, leading to the modification of mechanical properties. The presence of oxygen during ageing is of great importance for the physico-chemical modifications of those polymers in terms of oxidation and thermal stability. ENCs belong to cyclic olefin copolymers (COC) class, whose synthesis was developed in the late 1950s. Nevertheless, commercial applications are relatively new. They attract growing interest in different fields, due to their very useful physical and chemical properties such as transparency, heat and chemical resistance, low permeability to gas as well as biocompatibility. In the literature, a large number of papers deal with the synthesis and characterization of different grades of ENC, but only a few deal with the effects of ageing on these materials. This literature review consists of a summary of the main milestones in the development of COC as well as of cyclic olefin polymers (COP), a review of main techniques for predicting ageing, degradation of additives and interaction between COC/COP and contact environment as well as toxicity of the extractables.

show abstract

“…The opportunity of incorporating other olefins (as a third monomer) into the poly(ethylene-co-norbornene) backbone may lead to improvements in the mechanical or other physical properties of the polymer. There are only a few reports on terpolymerization of ethylene and norbornene [28][29][30][31]. The introduction of a termonomer, either a linear α-olefin, such as 1-octene (O), or an alicyclic α-olefin, like vinylcyclohexane, has been reported by Marconi et al [29], but a strong decrease of Mw has been observed for both 1-octene and vinylcyclohexane.…”

Section: The Norbornene (N) Content In the Mainmentioning

confidence: 99%

“…The resonances of all of these structural units, reported in Table 3, were attributed on the basis of a comparison with those reported in the literature [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Scheme 1 describes the possible paths leading to terpolymer chain unsaturation with a last-inserted E, N, O or Nx (C5N or C8N) unit.…”

Section: (A) Poly(eter-n-ter-c5n); (B) Poly(e-ter-n-ter-c8n); and (C)mentioning

confidence: 99%

Terpolymerization of Substituted Cycloolefin with Ethylene and Norbornene by Transition Metal Catalyst

et al. 2016

View full text Add to dashboard Cite

Abstract:Ethylene-norbornene terpolymerization experiments using 5-alkyl-substituted norbornenes (5-pentyl-2-norbornene (C 5 N) and 5-octyl-2-norbornene (C 8 N)) or dicyclopentadiene (DCPD) were conducted with two ansa-metallocenes, [Zr{(η 5 -C 9 H 6 ) 2 C 2 H 4 }Cl2] (1) and [Zr{(η 5 -2,5-Me 2 C 5 H 2 ) 2 CHEt}Cl 2 ] (2), activated by methylaluminoxane (MAO). The terpolymers obtained were investigated in detail by determining the microstructure and termonomer contents by 13 C NMR, molar masses and thermal properties. Results were compared to those of ethylene (E)-norbornene (N) terpolymerizations with 1-octene. 2, with lower steric hindrance and a shorter bridge, gave the best activities, termonomer incorporation and molar masses. The size of the substituent in 5-alkyl substituted norbornene also plays a role. C 8 N gives the highest activities and molar masses, while DCPD terpolymers have the highest cycloolefin content. Terpolymers are random; their molar masses, much higher than those in 1-octene terpolymers, are in a range useful for industrial applications. Finally, T g values up to 152˝C were obtained. For similar N content, poly(E-ter-N-ter-C 8 N)s and poly(E-ter-N-ter-DCPD)s have the lowest and the highest T g values, respectively. Thus, the presence of an eight-carbon atom pendant chain in C 8 N increases the flexibility of the polymer chain more than a five-carbon atom pendant chain in C 5 N. The higher rigidity of C 5 N may lead to lower activities and to increasing probability of σ-bond metathesis and chain termination, as evidenced by chain-end group analysis.

show abstract

Preparation of Polar Ethylene–Norbornene Copolymers by Metallocene Terpolymerization with Triisobutylaluminium‐Protected But‐3‐en‐1‐ol

Cited by 31 publications

References 26 publications

Influence of chain microstructure on ethylene–norbornene copolymer film properties

Influence of chain microstructure on ethylene–norbornene copolymer film properties

Physico-chemical ageing of ethylene–norbornene copolymers: a review

Terpolymerization of Substituted Cycloolefin with Ethylene and Norbornene by Transition Metal Catalyst

Contact Info

Product

Resources

About