Synthesis of MQ silicone resins through hydrolytic condensation of ethyl polysilicate and hexamethyldisiloxane

✍ Scribed by Wei Huang; Ying Huang; Yunzhao Yu

• Book ID: 101250510
• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 116 KB
• Volume: 70
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19981128)70:9<1753::aid-app13>3.0.co;2-v

✦ Synopsis

MQ silicone resins were synthesized through hydrolytic condensation of ethyl polysilicate and hexamethyldisiloxane. The structure of the MQ resins was characterized by NMR and GPC. The concentration of an acid catalyst was essential for the capping of functional groups with the monofunctional units. The acid-catalyzed resins had a narrow molecular weight distribution. After postcondensation catalyzed by a base, the molecular weight distribution became bimodal.