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苯乙烯(简称St)-4(甲基丙烯酸)2,2,6,6-四甲基哌啶醇酯(简称MTMP)共聚物(简称PDS)是七十年代发展起来的一种新型高效光稳剂。本文用IR研究了一系列自由基聚合的PDS共聚物,找出了MTMP对序列结构敏感的吸收峰,发现MTMP的1152.5厘米~(-1)峰位置与三单元序列分布F_(SMS)值有一定线性关系,还对通过测量MTMP羰基伸缩振动ν_(C=O)峰位置来计算二单元序列分布P_(mm)的关系进行了讨论。
Styrene (referred to as St) -4 (methacrylic acid) 2,2,6,6 - tetramethylpiperidinol (referred to as MTMP) copolymer (hereinafter referred to as PDS) is developed in the seventies a new type of high efficiency light Stabilizer. In this paper, a series of free-radical polymerization PDS copolymers were studied by IR, and the absorption peaks sensitive to the sequence structure of MTMP were found. It was found that the peak position of 1152.5 cm -1 and the SMS value of three-unit sequence The relationship between the two-unit sequence distribution P mm is also discussed by measuring the position of the ν_ (C = O) peak of carbonyl stretching vibration of MTMP.