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  • 1
    Electronic Resource
    Electronic Resource
    Macromolecular compounds (1955)
    Springer
    Russian chemical bulletin 4 (1955), S. 1007-1010 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. A study was made of the polycondensation of 1,2-dichloroethane with toluene with formation of poly[ethylenetolyl]. the low-molecular=weight products of this reaction were ar.ar'-dimethylbibenzyI and bis(2-tolylethyl) toluene. 2. The structure of the polycondensation products formed from 1,2-dichloroethane and toluene was established. 3. It was shown that the cause of the greater difficulty with which three-dimensional polymers are formed in the polycondensation of 1,2-dichloroethane with toluene— as compared with the analogous reaction between 1,2-dichloroethane and chlorobenzene— is the steric hindrance that arises from an arrangement of substituents oriented predominantly meta to one another.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01173977
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  • 2
    Electronic Resource
    Electronic Resource
    High-molecular compounds Part 52. Reactions of polyester macromolecules with each other (1952)
    Springer
    Russian chemical bulletin 1 (1952), S. 967-971 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. A study of the exchange reaction between polyesters of different molecular weight shows that they react to give a single polyester. 2. The low-molecular polyester acts as a degradative agent with respect to the high-molecular ester. 3. The extent of degradation of the high-molecular polyester is proportional to the content of the low-molecular polyester in the mixture. 4. The polydispersity coefficient falls during heating of polyester mixtures as a result of the degradative reaction. 5. A study of the kinetics of degradation of high-molecular polyesters when heated with low-molecular polyesters shows that the polydispersity coefficient falls regularly as the reaction proceeds. 6. A study has been made of the thermal degradation of polyesters at various temperatures. 7. The exchange reaction is shown to be of considerable significance for the process of polycondensation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01172356
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    Paper (German National Licenses)
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