In:
Macromolecular Chemistry and Physics, Wiley, Vol. 218, No. 13 ( 2017-07)
Abstract:
In this paper, a series of polysiloxanes, presenting different contents of densely simple and well‐defined short‐branched chains (G 1 –G 5 ), are prepared by hydrosilylation of α,ω‐(dimethylvinylsiloxy)‐poly(dimethyl‐methylvinyl)siloxanes (P 1 –P 5 ) with 1,1,1,3,5,5,5‐heptamethyltrisiloxane (MD H M) and characterized by 1 H and 29 Si nuclear magnetic resonance, Fourier transform‐infrared spectroscopy, Abbe refractometry, gel permeation chromatography, and differential scanning calorimetry. The rheological behaviors of the G 1 –G 5 products are investigated to study the influences of the short‐branched chains. The rheological parameters including non‐Newtonian index ( n ) and the flow activation energy (Δ E η ) are obtained and discussed. It is observed that the G 1 –G 5 polymers belonged to pseudoplastic fluids and the Δ E η values of the G 1 –G 5 products are significantly influenced by the short‐chain branching degree of the polymers. image
Type of Medium:
Online Resource
ISSN:
1022-1352
,
1521-3935
DOI:
10.1002/macp.v218.13
DOI:
10.1002/macp.201700005
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
1475026-0
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