Hyperbranched polyester modified epox...

Hyperbranched polyester modified epoxy resin has excellent performances

Posted in the Financial Services Forum

PAMAM

Jinan, China

#1 Oct 20, 2013
Hyperbranched polyester modified epoxy resin has excellent performances
Hyperbranched polymer has low viscosity, high functionality, no chain entanglement and good solubility characteristics, provides a new way for epoxy toughening. Modifying the hydroxyl-terminated hyperbranched polyester (AHBP) obtained hyperbranched polyester with carboxyl end group (CHBP), not only has the toughening effect, but also play the role of a curing agent. Using CHBP as flexibilizer and curing agent, study its toughing effect on epoxy/MTHPA (EP/MeTHPA) curing system; CHBP molecular terminal all with carboxyl has the best toughening effect, impact strength achieves 18.5 kJ/m2; when the carboxyl terminal content reaches 40%, the impact strength of the epoxy resin is only 7.8 kJ/m, CHBP has no toughening effect at this time. When CHBP mass fraction is 15%, tensile strength achieves the maximum , 64.86 Mpa; when CHBP mass fraction is 15%, the Tg of the resulting cured epoxy resin is 106 ℃, increased about 6 ℃. Weihai CY Dendrimer Technology Co. Ltd forwards from "Study on carboxyl - terminated hyperbranched polyester modif ied epoxy resin curing systems" Wang Xiaoke, Tian Mi (Chongqing University of Science and Technology, Chongqing 401331) Thermosetting Resin, 2008,3 (23), 25-28
PAMAM

Jinan, China

#3 Oct 20, 2013
Effect of novel hyperbranched polyester on PVC mechanical and rheological properties.
Hyperbranched polyester can effectively improve the processing fluidity of PVC:
(1) Tensile properties of hyperbranched polyester modified PVC is sensitive to the processing temperature , at 170 ℃ open mill temperatures, hyperbranched polyester/PVC tensile properties reaches maximum; (2) Compared with the traditional processing agent ACR, adding hyperbranched polyester substantially does not affect the mechanical properties, but hyperbranched polyester has large advantage in the processing temperature to reduce plasticizing temperature of PVC; (3) Adding hyperbranched polyesters in PVC also can significantly reduce the viscosity of PVC, and the increasing amount of hyperbranched polyester is good for PVC processing. Weihai CY Dendrimer Technology Co. Ltd forwards from "The Effect of Hyperbranched Polyester on Mechanical and Rheological Properties of Rigid PVC" Wang Guojian, Wang Changming, Li Yan, Tongji University, Plastics 2006 Volume 35, Issue 6 15-19

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