The Chemistry of India Rubber Including the Outlines of a Theory On Vulcanizati
The Chemistry of India Rubber Including the Outlines of a Theory On Vulcanizati
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To face p. 90. THE CHEMISTRY OF INDIA RUBBER. 9! The amount of organic matter extracted is very slight, amounting to- less than 2 per cent, in all the three samples. The samples were extracted until a full day's further extraction pro- duced no appreciable increase in the amount of free sulphur removed. They were then dried, and the combined sulphur in them estimated by CARIUS' process. The following are the results obtained : Sample I. 33*08 per cent, of combined sulphur. II. 33-11 III. 32-64 ...These figures quite satisfactorily approximate to the theoretical amount of sulphur in polyprene disulphide, C 10 H 16 S. 2 = 32'00 per cent. S. It is rather curious that the amount of sulphur ascertained approaches the theoretical amount the more closely, the shorter the time the sample has been heated, and the larger the amount of sulphur with which it had been mixed. I am inclined to think that this is not accidental, but points to the fact that substitution takes place after, or towards the end of, the addition process.
What to read after The Chemistry of India Rubber Including the Outlines of a Theory On Vulcanizati?
You can find similar books in the "Read Also" column, or choose other free books by Carl Otto Weber to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
To face p. 90. THE CHEMISTRY OF INDIA RUBBER. 9! The amount of organic matter extracted is very slight, amounting to- less than 2 per cent, in all the three samples. The samples were extracted until a full day's further extraction pro- duced no appreciable increase in the amount of free sulphur removed. They were then dried, and the combined sulphur in them estimated by CARIUS' process. The following are the results obtained : Sample I. 33*08 per cent, of combined sulphur. II. 33-11 III. 32-64 ...These figures quite satisfactorily approximate to the theoretical amount of sulphur in polyprene disulphide, C 10 H 16 S. 2 = 32'00 per cent. S. It is rather curious that the amount of sulphur ascertained approaches the theoretical amount the more closely, the shorter the time the sample has been heated, and the larger the amount of sulphur with which it had been mixed. I am inclined to think that this is not accidental, but points to the fact that substitution takes place after, or towards the end of, the addition process.
What to read after The Chemistry of India Rubber Including the Outlines of a Theory On Vulcanizati?
You can find similar books in the "Read Also" column, or choose other free books by Carl Otto Weber to read onlineMoreLess
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