Length and Degree of Polymerization

C-C bond length / and degree of polymerization n) was calculated to be ca. 30. appreciably higher than the value 7 of PE coil [2]. In the case of PE, on the other hand, the all-trans planar-zigzag conformation is the most stable, as observed predominantly in the... 

Note that the terms chain length and degree of polymerization can be used interchangeably, and both are represented by x. 

Shinoda R, Saito T, Okita Y, Isogai A (2012) Relationship between length and degree of polymerization of TEMPO-oxidized cellulose nanofibrils. Biomacromolecules 13 842-849... 

FIGURE 5.1 Cluster model of amylopectin. A and B denote nomenclature of branch chains, 0=reducing end, c.l. = chain length in degree of polymerization. Reprinted from Carbohydrate Research, Vol. 147, Hizukuri (1986), Polymodal distribution of the chain lengths of amylopectin, and its significance, Pages 342-347, with permission from Elsevier. 

Photoinitiation is limited to thin layers due to the low penetration of light, nevertheless it possesses several advantages compared to the common techniques. Thus, it is possible to control the rate and degree of polymerization and also the number and length of crosslinks, by the intensity of light. 

The aforesaid complexities make it virtually impossible to write explicit general equations for the rate of polymerization, kinetic chain length, average degree of polymerization as has been done above for a completely dissociated ionic initiator. With the exception of those simple cases discussed above, each system in anionic polymerization represents a kinetically unique problem and must be solved separately. 

The problem of understanding the persistence length and its consequences is also taken up by Butt et al. [26] for bottle-brush polymers, there is the challenging problem of understanding how their stifliiess depends oti the grafting density and degree of polymerization of the grafted side chains. 

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