Indexed by:期刊论文

Date of Publication:2022-06-29

Journal:大连理工大学学报

Volume:51

Issue:4

Page Number:479-485

ISSN No.:1000-8608

Abstract:The poly(acrylonitrile-butadiene-styrene)(ABS)resins were synthesized
   via bulk polymerization method using nickel catalyzed high-cis
   polybutadiene rubber(Ni-9004),lithium catalyzed low-cis polybutadiene
   rubber(Li-700A)and their composite rubbers as modifiers.The influences
   of reaction time and content of composite rubber on the polymerization
   reaction,grafting parameters and microstructures of ABS were
   investigated.And the morphologies and mechanical properties of resins
   under different incorporation ratio of composite rubbers were also
   researched.It is shown that the grafting degree of Ni-9004 gradually
   increases and its grafting efficiency and volume fraction of rubber
   phase gradually decrease with the reaction time.Besides,an obvious phase
   inversion occurs in the polymerization process and the final ABS resin
   presents a typical core-shell structure.And its morphology can be
   distinctly improved when combined with Li-700A.Furthermore,the lower
   amount of composite rubber is beneficial to grafting and occlusion,which
   shows a positive reinforcement value;an augmented particle size and a
   negative value are obtained while composite rubber amount
   increases.Performance measurements show that the toughening effect of
   Li-700A can be significantly enhanced by incorporating Ni-9004.When its
   incorporation content reaches 75%,the notched Izod impact strength of
   ABS resin is improved by at least 150%,while there is no loss of the
   tensile strength.

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