The infrared spectrum of polyethylene terephthalate. I The effect of crystallization
作者:Akihisa Miyake
DOI:10.1002/pol.1959.1203813419
日期:1959.8
bands that intensify in the crystalline state of these model compounds correspond to the crystalline bands of polyethyleneterephthalate, and the bands that appear in the melt of model compounds correspond to the amorphous bands of polyethyleneterephthalate. Main crystalline bands and all of the amorphous bands are associated with ethylene glycol residue. A crystalline band makes a couple with one of
将无定形聚对苯二甲酸乙二醇酯薄膜拉伸并加热到不同程度。跟踪由这些处理引起的红外光谱带的强度变化。有超过 7 个带通过拉伸改变其强度,16 个带受热处理影响。在乙二醇的几种芳族酯中也观察到完全相同的变化。在这些模型化合物结晶状态下增强的谱带对应于聚对苯二甲酸乙二醇酯的结晶谱带,出现在模型化合物熔体中的谱带对应于聚对苯二甲酸乙二醇酯的无定形谱带。主要结晶带和所有无定形带都与乙二醇残留物有关。结晶带与其中一个非晶带形成一对,并且这对的频率具有合理的值作为乙二醇残基的特征振动。因此,光谱变化可以通过乙二醇残基的旋转异构来解释,无定形部分中的 gauche 形式通过结晶转变为反式。973 cm 处的结晶带。-1对应反式的Bu型CO伸缩振动,1099和1042cm处的非晶带。-1对应于gauche形式的A和B型CO伸缩振动。1475、1387 和 988 cm 处的结晶带。-1 被认为是晶体场扰动的表
PYRROLO[2,3-D]PYRIMIDINE DERIVATIVES: THEIR INTERMEDIATES AND SYNTHESIS
申请人:Gut Ruggeri Sally
公开号:US20120259115A1
公开(公告)日:2012-10-11
This invention relates to methods and intermediates useful for the synthesis of pyrrolo [2,3-d] pyrimidine compounds. Specifically novel synthetic methods and intermediates for the synthesis of 3-(3R,4R)-4-methyl-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-amino}-piperidin-1-yl)-3-oxo-propionitrile and its corresponding citrate salt are disclosed.
ULTRAVIOLET ABSORBING POLYMER, CELLULOSE ESTER OPTICAL FILM, METHOD OF PRODUCING CELLULOSE ESTER OPTICAL FILM, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY
申请人:Suzuki Takayuki
公开号:US20100104775A1
公开(公告)日:2010-04-29
Disclosed is an ultraviolet absorbing polymer which is characterized by being derived from an ethylenically unsaturated monomer having a partial structure represented by Formula (A) below in a molecule, and a monomer represented by Formula (B) below:
INDANE-AMINE DERIVATIVES, THEIR PREPARATION AND USE AS MEDICAMENTS
申请人:Garcia-Lopez Monica
公开号:US20110053980A1
公开(公告)日:2011-03-03
The present invention relates to indane-amine compounds of general formula (I) and compositions thereof, methods for their preparation, and the use of said compounds for the preparation of a medicament for the treatment of humans or animals.
Pyrrolo[2,3-d]Pyrimidine Derivatives; Their Intermediates and Synthesis
申请人:Gut Ruggeri Sally
公开号:US20110288297A1
公开(公告)日:2011-11-24
This invention relates to methods and intermediates useful for the synthesis of pyrrolo[2,3-d]pyrimidine compounds. Specifically novel synthetic methods and intermediates for the synthesis of 3-(3R,4R)-4-methyl-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-amino}-piperidin-
1
-yl)-3-oxo-propionitrile and its corresponding citrate salt are disclosed.