Quantitative Analysis of Microstructure in Polysiloxanes Using High Resolution 29Si NMR Spectroscopy: Investigation of Lot Variability in the LVM97 and HVM97 PDMS/PDPS Copolymers.

Alam, T. M.

Technical Information Center Oak Ridge Tennessee

关键词: Spectroscopy;    Polysiloxane copolymers;    NMR analysis;    Microstructural analysis;    Nomenclature;   

RP-ID  :  DE2003805875

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The quantitative analysis of microstructure and sequence distribution in polysiloxane copolymers using high-resolution solution 29Si NMR is reported. Copolymers containing dimethylsiloxane (DMS) and diphenysiloxane (DPS) monomer units prepared with either high vinyl content (HVM) or low vinyl content (LVM) were analyzed. The average run length (Rexp), the number average sequence length (lA, lB), along with the various linkage probabilities (pAA, pAB, pBA, and pBB) were determined for different production lots of the LVM97 and HVM97 samples to address the lot variability of microstructure in these materials.