Detail of "840-65-3"

Reference

Raw materials and intermediates for the preparation of PEN

Raw materials and intermediates for the preparation of PEN. Xu, Jie; Qian, Xinhua; Li, Hongbing; Luo, Qian; Ma, Wenbin; Li, Zhenyou (No. 2 Petroleum Factory of Fushun Petrochemical Corp., CNPC, Peop. Rep.Several reagents with their cas registry numbers 840-65-3 and 581-42-0 are used here. China). Xiandai Suliao Jiagong Yingyong, 14(4), 38-42 (Chinese) 2002 Zhongguo Shihua Jituan Gongsi Xiandai Suliao Jiagong Yingyong Qingbao Zhongxinzhan. CODEN: XSJYAM. ISSN: 1004-3055. DOCUMENT TYPE: Journal; General Review CA Section: 35 (Chemistry of Synthetic High Polymers) A review on the prepn. of intermediates and monomers for the prodn. of poly(ethylene 2,6-naphthalate) (PEN), including: 2,6-dimethylnaphthalene, 2,6-naphthalic acid and di-Me 2,6-naphthalate. .

Photochemical reactions in commercial poly(ethylene 2,6-naphthalate)

Photochemical reactions in commercial poly(ethylene 2,6-naphthalate). Allen, N. S.; McKellar, J. F. (Dep. Chem. Appl. Chem., Univ. Salford, Salford/Lancashire, Engl.). J. Appl. Polym. Sci., 22(8), 2085-92 (English) 1978. CODEN: JAPNAB. ISSN: 0021-8995. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) The photodegrdn. of poly(ethylene 2,6-naphthalate) (I) [24968-11-4] films was examd. by absorption and emission spectroscopy by flash photolysis techniques to establish the mechanism of photodeterioration. A comparison of the emission spectra with that of a model compd., di-Me 2,6-naphthalate (II) [840-65-3] showed that the chromophoric species responsible for light absorption in the near UV region was the unit structure of the polymer itself. A flash photolysis study of II indicated that the major primary process in the photodeterioration of I involves scission by decarboxylation at the naphthyl-carbon bond, probably resulting in the formation of naphthalenic chain ends with little extended conjugation.