No abstract

No abstract

Soy protein isolate (SPI) films were formed by cross linking with resorcinol. The resorcinol content was varied and its effect on mechanical properties was measured. The variation of tensile creep modulus with time for different loadings of resorcinol indicated a higher value when the resorcinol content was 10 and 20% of the weight of SPI. The addition of 20% resorcinol led to an overall increase in the tensile strength from 4.9 to 24.7 MPa and modulus increases from 801 to 1358 MPa than SPI films. The percent elongation was also increased from 3.2 to 8.4 when compared to unmodified SPI film. The impact strength was at a maximum and moisture content at a minimum for 20% resorcinol content.

No abstract

The natural uniaxial fabric from the bark of the tree Polyalthia cerasoide was extracted. The fabric was treated with 5% aqueous NaOH solution. The primary thermograms of both untreated and the alkali treated fabrics were recorded in an inert atmosphere at a heating rate of 10°C/min. Using these thermograms, the initial and final degradation temperatures and inflection points were calculated. Employing the Doyle method, the integral procedural degradation temperature and refractoriness were also determined. The thermal stability was found to slightly increase on alkali treatment. The morphology of the fabric before and after alkali treatment was studied. The tensile parameters — maximum stress, Young’s modulus, and percent elongation at break — were also determined for both untreated and alkali treated Polyalthia Cerasoides fabrics. An improvement in tensile properties was observed on alkali treatment.