Synthesis of polypropylene-graft-norbornene by reactive extrusion and its rheological behavior

To overcome the steric effect of norbornene (NB), first-generation Grubbs’ catalyst (GC1) was used as the catalyst to graft NB onto the polypropylene (PP) chain by reactive extrusion. Instead of harsh reaction conditions, such as anhydrous, which was the general method to synthesize NB polymers, this convenient method would be easier to industrialize. The mechanism of grafting was studied by using Fourier Transform InfraRed spectra and differential scanning calorimetry. It was found that GC1 could initiate the ring-opening metathesis polymerization of NB to obtain short NB chain-grafted PP-g-NB. The rheological behavior showed that the grafted NB short chains on PP-g-NB increase the shear thinning of the polymers and decrease the system viscosity.

[1]  R. Murakami,et al.  Investigation on the interface modification of PET/PP composites , 2019, Modern Physics Letters B.

[2]  Hirofumi Tanaka,et al.  Self-assembly and ring-opening metathesis polymerization of cyclic conjugated molecules on highly ordered pyrolytic graphite. , 2018, Chemical communications.

[3]  Haifeng Gao,et al.  Tandem Functionalization in a Highly Branched Polymer with Layered Structure. , 2018, Chemistry.

[4]  P. Poveda,et al.  Study of different process additives applied to polypropylene , 2018 .

[5]  Jie Dong,et al.  Homo- and copolymerization of norbornene with tridentate nickel complexes bearing o-aryloxide-N-heterocyclic carbene ligands. , 2018, Dalton transactions.

[6]  B. S. Lima-Neto,et al.  Bio-based plant oil polymers from ROMP of norbornene modified with triglyceride from crude red palm olein , 2016 .

[7]  Kenzo Inoue,et al.  Radical copolymerization of methyl 2-norbornene-2-carboxylate and 2-phenyl-2-norbornene with styrene, alkyl acrylate, and methyl methacrylate: Facile incorporation of norbornane framework into polymer main chain and its effect on glass transition temperature , 2010 .

[8]  C. Janiak,et al.  Metal catalysts for the vinyl/addition polymerization of norbornene , 2009 .

[9]  Liu Chang-song,et al.  Low-Frequency Internal Friction Study on the Structural Changes in Polymer Melts , 2008 .

[10]  Kenzo Inoue,et al.  Radical copolymerization of alkyl 2‐norbornene‐2‐carboxylate with alkyl acrylates: Facile incorporation of norbornane framework into poly(alkyl acrylate)s , 2007 .

[11]  Qing Wu,et al.  Copolymerization of norbornene and styrene catalyzed by a novel anilido–imino nickel complex/methylaluminoxane system , 2006 .

[12]  T. Shiono,et al.  Living Random Copolymerization of Propylene and Norbornene with ansa-Fluorenylamidodimethyltitanium Complex: Synthesis of Novel Syndiotactic Polypropylene-b-poly(propylene-ran-norbornene) , 2006 .

[13]  T. Ikeda,et al.  Random Copolymerization of Propene and Norbornene with ansa-Fluorenylamidodimethyltitanium-Based Catalysts , 2005 .

[14]  Tariqul Hasan,et al.  Ethene−Norbornene Copolymer with High Norbornene Content Produced by ansa-Fluorenylamidodimethyltitanium Complex Using a Suitable Activator , 2004 .

[15]  M. Fujiki,et al.  Efficient Ethylene/Norbornene Copolymerization by (Aryloxo)(indenyl)titanium(IV) Complexes−MAO Catalyst System , 2003 .

[16]  Zhi Ma,et al.  Homo- and Copolymerization of Norbornene and Styrene with Pd- and Ni-Based Novel Bridged Dinuclear Diimine Complexes and MAO , 2003 .

[17]  Ayusman Sen,et al.  Copolymerization of Methyl Acrylate with Norbornene Derivatives by Atom Transfer Radical Polymerization , 2002 .

[18]  H. Cramail,et al.  Homopolymerization and copolymerization of styrene and norbornene with Ni-based/MAO catalysts , 1998 .

[19]  S. Nguyen,et al.  Ring-opening metathesis polymerization (ROMP) of norbornene by a Group VIII carbene complex in protic media , 1992 .