Private-Dissemination events

green Thermosets – Nanocomposites of Rosin/Maghnite










Visits Portugal &


Dissemination events


Seminars and Workshops


2019 Algiers Ecole Thematics  Invited


CDRSP Speakers at the Ecole Thematique Cooperation Algero-Portugaise



Seminar Series at CDRSP Circulated widely to Industrial Companies


Seminar presented by Anis Zaoui and Zakararia Cherifi

On ” Rosin Vinyl Imidazolium Based Compounds as Potential Advanced Biocompatible Materials”




Visits and meetings with companies


3 visits to RESPOL a rosin converter based in Leiria, they also carried out some sample characterisation for CDRSP and produced a special derivative of rosin to test some ideas on stability

2 meetings with Association of ROSIN producers in Portugal and Spain


Special book produced on “Rosin – an untapped green resource for the future for Portugal” – Vol 4 CDRSP knowledge series, series design to disseminate developments at CDRSP to the wider communities in suitable language and style


Poster Presentations at International Conferences


Polymer Connect Lisbon 2020

Green Nanocomposites Prepared with Rosin-Limonene copolymer and Algerian Clay (Maghnite-CTAB)

  Derdar hodhaifa 1, 2, Geoffrey Robert Mitchell 3, Meghabar Rachid 2, Bachari Khaldoun 1

1 Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques    (CRAPC), BP 10 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail CP 42004, Tipaza, Algeria.

2 Laboratoire de Chimie des Polymères, Département de Chimie, FSEA, Oran1 University Ahmed Benbella BP N° 1524 El M’Naouar, 31000 Oran, Algeria.


3 Centre for Rapid and Sustainable Product Development, Institute Polytechnic of Leiria,

Marinha Grande, Portugal.

Presenter Contact Details (Email, Mob Number) {Email:, +86-1234567}

The aim of this work is to prepare green thermosets using two natural sustainable and cheap materials (Rosin and Maghnite). The rosin is a solid form of resins obtained from pines and similar types of plants belonging to the conifer family, produced by heating fresh liquid resin to vaporize the volatile liquid terpene (large group of unsaturated hydrocarbons). The Maghnite is natural clay from the montmorillonite family that comes from the region of Maghnia (Telemcen-Algeria). The propos of those modifications is on one hand to enhance the thermal and the mechanical properties of the rosin and on the other hand to make both the rosin and the Maghnite suitable for the preparation of nanocomposites. The synthesis of green nanocomposites using Rosin-Limonene as a copolymer and Maghnite as a nanorenfort was done by two steps; first we polymerize limonene by cationic polymerization using Maghnite-H+ as a catalyst. The FT-IR and H-NMR have confirmed the polymerization of limonene. The obtained polymer is intercalated in the clay sheets. Afterwards, the Rosin is added to the reaction mixture in order to synthesize copolymers- nanocomposites/ clay and to extract a green material from a green raw material (limonene, Rosin and clay). Following the same procedure we use Maghnite-CTAB for the synthesis of nanocomposites limonene-rosin/clay by in situ polymerization. The obtained nanocomposites were characterized by FT-IR, TGA, XRD and SEM analysis.



RESIM 2018 (Virtual Conference)

Rosin the ultimate green material

Vidhura Mahendra1, Hodifar Derdar1,  Geoffrey R Mitchell1*

1Centre for Rapid and Sustainable Product Development, Institute Polytechnic of Leiria,

Marinha Grande, Portugal

*Email of corresponding author:


Keywords: Green Chemistry, products from the forest, biopolymers, bicomposites

Rosin is a material which can be extracted from pine resin using green technology. In the first half of the last century, Portugal was the leading exporter of rosin, but the industry has declined due to the high human resources required and today Portugal is a net importer. Rosin is a mixture of terpenes with functionality which make them a rich chemical resource. Rosin is a material which has been available for hundreds of years and has developed many niche applications some old, some new. We explore the potential of this material for preparing sustainable biopolymers and composites. We identify the reaction paths and review work which has already been reported.