Controlling Heat Transfer for the Manufacturing of High Molecular Weight Polyisobutylene via Formation of Micelles

Csihony, Szilárd; Janssen, Nicole; Mühlbach, Klaus

doi:10.1007/s10118-019-2250-z

Cited by 4 publications

(2 citation statements)

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“…High molecular weight polyisobutylene (HPIB), which owns viscosity average molecular weight (M v ) higher than 10 5 g•mol −1 , is one of the most unusual polymers and exhibits numerous excellent properties such as extremely low gas permeability, outstanding thermal stability and low fragility [1,2]. Thus it has been applied in the manufacture of sealant, automotive, medical equipment and so forth [3].…”

Section: Introductionmentioning

confidence: 99%

“…− trapped in micelles consisting of functionalized low molecular weight PIB. The activity of the system was high enough that HPIB with M w = 1.7-9 × 10 5 g•mol −1 and molecular weight distribution (MWD) = 13-47 could be produced at T p = −76 • C [2]. Wu et al prepared a series of AlCl 3 /H 2 O/ED (ED = electron donor = methyl benzoate, ethyl benzoate, and methyl acrylate) initiating systems.…”

Section: Introductionmentioning

confidence: 99%

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A Complexed Initiating System AlCl3·Phenetole/TiCl4·H2O with Dominant Synergistic Effect for Efficient Synthesis of High Molecular Weight Polyisobutylene

et al. 2019

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A complexed initiating system AlCl3·phenetole/TiCl4·H2O was prepared by simply compounding AlCl3/phenetole and TiCl4/H2O and used for cationic polymerization of isobutylene. It was found AlCl3·phenetole/TiCl4·H2O exhibited activities 1.2–3 times higher than those of AlCl3/phenetole, and more than an order of magnitude higher than those of TiCl4/H2O, which indicated a notable synergistic effect produced in the complexed system. In addition, due to the higher activity of AlCl3·phenetole/TiCl4·H2O, lower coinitiator concentration and polymerization temperature, as well as higher monomer concentration were more favored for this complexed initiating system to produce polyisobutylene (PIB) with reasonable molecular weight (Mw) and molecular weight distribution (MWD). Furthermore, high molecular weight polyisobutylene (HPIB) with Mw = 1–3 × 105 g·mol−1 could be successfully produced by the complexed catalyst system at Tp = −60 to −40 °C. As a whole, the high activity as well as the simple preparation procedures of the complexed initiating system offer us a unique approach for the production of HPIB with improved efficiency.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%