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A thermoplastic, or thermosoftening plastic, is any plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. [ 1 ] [ 2 ] Most thermoplastics have a high molecular weight .
Available from 2014, replacing syllabus 6050; cannot be combined with syllabuses 0638 & 0649 link: CIE 7010 Computer Studies: Yes Yes Partial Common with syllabus 0420 ; last exam in 2014, to be replaced with syllabus 2210 from 2015 link: CIE 7017 Computer Studies (Singapore) Yes Yes No Singapore only; last exam in 2014 syllabus: CIE 7048
Before, this qualification was graded on an 8-point scale from A* to G with a 9th grade “U” signifying “Ungraded”. This measure of grading was also found in the UK GCSE. Most IGCSE subjects offer a choice of tiered examinations: Core or Extended papers (in Cambridge International), and Foundation or Higher papers (in Edexcel).
In materials science, a thermosetting polymer, often called a thermoset, is a polymer that is obtained by irreversibly hardening ("curing") a soft solid or viscous liquid prepolymer . [1] Curing is induced by heat or suitable radiation and may be promoted by high pressure or mixing with a catalyst .
The assessment system includes both internal and external assessments. Students are assessed internally through monthly and semester examinations, continuous homework, and class assessments. External assessment is done through Key Stage Examinations conducted by SAT, IGCSE and IAL testing conducted by Edexcel International. ref>"Curriculum ...
Under the recent syllabus, candidates can choose between Chemistry and ICT, although Combined Mathematics and Physics are mandatory. Combined Mathematics is a combination of Pure Mathematics and Applied Mathematics. Previously, candidates had to study these two subjects separately, but with the introduction of the Combined Mathematics syllabus ...
Another is a humidity-sensitive polymer used in self-adaptive wound dressings that automatically regulate moisture balance in and around the wound. [5] [6] The nonlinear response of smart polymers is what makes them so unique and effective. A significant change in structure and properties can be induced by a very small stimulus.
Chemical structure of Kapton, a polyimide. Polyimide (sometimes abbreviated PI) is a polymer containing imide groups belonging to the class of high-performance plastics.With their high heat-resistance, polyimides enjoy diverse applications in roles demanding rugged organic materials, such as high temperature fuel cells, displays, and various military roles.