Sulfur Dioxide → HCID 86732912, compound

HRID 1579941Notes

Reaction equation

HRID 1579941 reaction equation
[S:1](=[O:3])=[O:2].[CH:4]12[CH2:10][CH:7]([CH2:8][CH2:9]1)[CH:6]=[CH:5]2>CCCCCCC>[CH:4]12[CH2:10][CH:7]([CH2:8][CH2:9]1)[CH:6]=[CH:5]2.[S:1](=[O:3])=[O:2]

Participants

4

Reactant 2

HCID 1119Sulfur DioxideHCID 103522-Norbornene

Product 1

HCID 86732912HCID 86732912, compound

Reagents, catalysts & solvents 1

HCID 8900HeptaneSolvent2×

Procedure

In a preferred embodiment, which is intended to be illustrative only, to polyisobutylene having a molecular weight of about 4 × 106 and dissolved at a level of 5 grams in 100 ml of n-heptane is added 20 ml of liquid sulfur dioxide at a temperature of 0°C. Ten grams of norbornene dissolved in 10 ml of n-heptane is added and this mixture is agitated at 10,000 rpm for 5 minutes. The agitation is terminated and a block copolymer of polyisobutylene and norbornene-sulfur dioxide is isolated by precipitating in methanol. This material is found to have incorporated 7.2 wt. % sulfur. On this basis, the material is compared to a physical mixture of polyisobutylene and a norbornene sulfur dioxide copolymer at equal levels of sulfur. It is found that the block copolymer shows substantially greater modulus as compared to the physical mixture described.

Workup

  1. additionis added
  2. customThe agitation is terminated

Sources & evidence

ORD record
ord-a2da2e67e2294d1fa257cbb1a3cf8fbc
Source dataset
uspto-grants-1976_01
Patent number
US03932369

Reaction notes

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