Phenolic Foam Reinforced by Cedar’s Resin
Journal Title: Chemical Science International Journal - Year 2017, Vol 19, Issue 1
Abstract
Recently phenolic foams have been received much attention because of their excellent properties including flame resistance, low density, high thermal stability over a broad temperature range and low generation of toxic gases during combustion. Cedar resin was used as a toughening agent to modify the brittleness of phenolic foam. The cedar resin was first introduced to the phenol formaldehyde resin. The mixture was successfully used to prepare phenolic foam using appropriate combinations of flowing agent. Benzene Sulfonic acid was employed as a curing agent. Orthophosphoric acid and nonionic surfactant polyoxyethylene were used as foaming agent and surfactant respectively. The mechanical properties results showed that the incorporation of cedar resin into phenolic foam dramatically improved the compressive strength indicating the excellent toughening effect of cedar resin. In addition this property is depended to the percentage of the cedar resin. The apparent density data indicated that the addition of cedar resin can increase the apparent density of phenolic foam.
Authors and Affiliations
Ramzy Hamed, Yolla Kazzi, Houssein Awada
Assessment of Levels of Heavy Metals in Paints from Interior Walls and Indoor Dust from Residential Houses in Nairobi City County, Kenya
Aim: This study assessed the levels of Pb, Cr, Cd and Zn in settled indoor dust and paint chips. Study Design: Samples were obtained from twelve selected residential houses within Nairobi County, Kenya. Place and Duratio...
Hybrid Adsorbent for Removal of Cd(II), Cu(II), Pb(II) and Zn(II) from Waters Using Submersible Device
Mesoporous carbon and humic acid - native and oxidized with 5% or 15% hydrogen peroxide - were used to obtain hybrid adsorbents MC-HA, MC-HA5, and MC-HA15, respectively, for removing certain metal ions from water. Fine p...
Preparation and Biodegradation of Nanocellulose Reinforced Polyvinyl Alcohol Blend Films in Bioenvironmental Media
Solution casting method was used to prepare nanocellulose reinforced polyvinyl alcohol (PVOH) from Oil palm empty fruit bunches. Different environmental test were used to investigate the biodegradability of the composite...
Novel Imidazole and Dibenzothiophene-dioxide Containing Tetracyclic Systems
The aim of the current work is synthesis of new heterocyclic teratacyclic condensed systems that combine dibenzothiophenedioxide and imidazole in one molecule. The dibenzothiophene was taken as an initial compound and by...
Computer-Aided Design of Anticancer 1,4-Naphthoquinone Derivatives
Aims: Evaluation the impact of p-naphthoquinones upon biological activities and extent based upon QSAR technique. Study Design: QSAR Approach. Methodology: About twelve - eleven naphthoquinones which have cytotoxic effe...