J-mw,
1944
INDUSTRIAL AND ENGINEERING CHEMISTRY
ohsin am concerned. The edstence of such an influence would &tab the assumption of unprecedented long-range forces.
Hmw, the isoprene units must enter the chsin in a random maoner. A CY N0W LEDoMEN l
The wnbr is indebted to Mm. M. D. Robbins for carrying out much of the experimental work, and to Paul J. Flory for the banefit of vduable discussions. UIERANRE aM
(1) A l e h v s , J . Gan. C h . (U.8 . 8 . R.), 9. 1426 (1939): 11. 353 ,*aAdl, l."__,.
(2) AlekaeevaandBelitsksys,Ibid..11.358 (1941). (3) AUen.C. F. E.. . I . Am. C h .Soc.. 52,2955 (1930). (4) Arb. hi.srl. OatundA.. 30. 178 . . Auerb.oh and Plbddem-.
(1910).
(5) ~ b & n m , A n n . . 3 , 1 4 2(1832). (6) Erdm~Zbid.,362,148(1908).~ tn Fanton aod Siaaon. Proc. Cotnbndos Phil. Soe.. 14.386 (1808).
iaj ~ i s d e r . ~ r c l r . ~ l r a n n . . ~ 5 , ~ 6 ( 1 ~ 0 j ) . (9) k , 3. Am. C h .Sm..65.372 (1943).
(lo) Fullar. C. 8.. private communioation.
51
(11) Fuller.Frosoh. and Paw. J . Am. C h .Soc.. 62, 1906 (1940). (12) E&ea. "Untsmnhungen Ober die natbliehen wad MLnstliohen Kauteehukarten", P. 61, Berlin,J. Springer. 1919. (13) HU, Lewis. and 8imonean. TmM. FaraBay Soc.. 35. 1'337. 1073 (1939). (14) Mdor. "Compreheruive Trestiae on rnorgaoio and Theoreticd Chcrmiatrv". Vol. IV, PP. .. 827 s( a m . London. Lonmans. Green ana Co.. 1923. (15) Porta end Rumsen, Can#. rad.. 82. 1504 (1876): J . C h . &.,2663(1876). (16) Pumm-. Kdlaid-2.. 53.75 (1830): Rubbar C h . Tad..4.208 (1831). 17) Pumrnerer. Ebermayer. and DerW, Bar.. 64. 804 (1931); RubberCh.Twh..4.381(1931). (18) Pummerer, Metthhs, and BoCiwVi6als. B e . , 69, 170 (1936). (19) Rehner,uopublinhedresults. (20) Roaa. Pow. Ann., 108,M)O(1858). (21) Bods, OOU. &
