PMID- 34451199
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210831
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 13
IP  - 16
DP  - 2021 Aug 10
TI  - Preparation of Bisphenol-A and Polydimethylsiloxane (PDMS) Block Copolycarbonates 
      by Melt Polycondensation: Effects of PDMS Chain Length on Conversion and 
      Miscibility.
LID - 10.3390/polym13162660 [doi]
LID - 2660
AB  - This study aimed to improve polydimethylsiloxane (PDMS) conversion in the 
      preparation of polycarbonate (PC)-polydimethylsiloxane (PDMS) copolymer through 
      melt polycondensation. We examined the transesterification process of PDMS with 
      diphenyl carbonate (DPC) and its copolymerization products with bisphenol-A (BPA) 
      for different chain lengths of PDMS. The key factors affecting PDMS conversion 
      were investigated. Results showed that long-chain PDMS required a higher critical 
      transesterification level (38.6%) to improve miscibility with DPC. During 
      polycondensation, side reactions were more prone to occur when the equilibrium 
      transesterification level of long-chain PDMS was lower. PDMS conversion was also 
      lower when more short-chain PDMS was fed. Increasing the chain length of PDMS 
      also reduced PDMS conversion. Notably, increasing the amount of KOH can 
      significantly improve PDMS conversion throughout the polycondensation stage by 
      increasing the equilibrium transesterification level of long-chain PDMS, thereby 
      inhibiting the occurrence of side reactions.
FAU - Zhou, Zibo
AU  - Zhou Z
AD  - Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials 
      Science & Engineering, East China University of Science & Technology, Shanghai 
      200237, China.
FAU - Wu, Guozhang
AU  - Wu G
AD  - Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials 
      Science & Engineering, East China University of Science & Technology, Shanghai 
      200237, China.
LA  - eng
PT  - Journal Article
DEP - 20210810
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC8401443
OTO - NOTNLM
OT  - PC-PDMS copolymer
OT  - conversion
OT  - equilibrium transesterification level
OT  - melt polycondensation
OT  - miscibility
COIS- The authors declare no conflict of interest.
EDAT- 2021/08/29 06:00
MHDA- 2021/08/29 06:01
PMCR- 2021/08/10
CRDT- 2021/08/28 01:02
PHST- 2021/07/18 00:00 [received]
PHST- 2021/08/01 00:00 [revised]
PHST- 2021/08/03 00:00 [accepted]
PHST- 2021/08/28 01:02 [entrez]
PHST- 2021/08/29 06:00 [pubmed]
PHST- 2021/08/29 06:01 [medline]
PHST- 2021/08/10 00:00 [pmc-release]
AID - polym13162660 [pii]
AID - polymers-13-02660 [pii]
AID - 10.3390/polym13162660 [doi]
PST - epublish
SO  - Polymers (Basel). 2021 Aug 10;13(16):2660. doi: 10.3390/polym13162660.