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241. And a high molecular weight poly ( arylene ether nitrile sulfone ) has obtained.

242. It summarized the mechanisms of ultra-violet degradation and stabilization of poly (vinyl chloride) (PVC) as well as the latest characterization methods in study of photodegradation of PVC.

243. It is possible to fabricate ISFET entirely using CMOS process. The gate structure of the ISFET is a multilayer, which consists of insulator, poly and metal. So it is called multilayer-gate.

244. The invention discloses a method for producing poly sodium metaphosphate and a special equipment thereof, belonging to a technical filed of metaphosphate.

245. Different allels mey be acquired within the invented segment after the inversion poly morphism is established.

246. Poly ( acrylic acid acrylamide ) alkali metal salt complex is a new kind of solid polymer electrolytes.

247. Poly ( vinyl alcohol ) has been protected against radiation by benzalation and benzoylation.

248. UV and PL spectra showed that the adamantane modified polyfluorenes exhibited less chain aggregation in comparison with the homo-polymer poly(9,9-dihexylfluorene)(PF6).

249. Meanwhile, with the introduction of phenylene units into polymer backbone, a series of poly(heteroarylene methine) polymers were synthesized.