Table 4. Six tests to help identify plastics typePVC/uPVCAcrylicPolystyrenePhenolicPolyethyleneTest 1Can beVariousDarkClear ,Low or highAppearancegradesdensitycoloredplasticizedtranslucentToughed,Or opaquetransparentTest 2Can beShatterSome can beCan be cutShatterwhenRigiditycut with acut with awith a sharpwhen struckknifestrucksharpsharp knife,knifesomeshatterwhen struckDoesn'tTest 3Doesn'tPlasticizedToughenedBendingbendbendBending(Bendingbendingeasilyeasily)other doesn't
PVC/uPVC Polystyrene Polyethylene Phenolic Acrylic Test 1 Appearance Can be plasticized Various grades Toughed, transparent Low or high density Dark colored Clear , translucent Or opaque Test 2 Rigidity Can be cut with a sharp knife Some can be cut with a sharp knife, some shatter when struck Can be cut with a sharp knife Shatter when struck Shatter when struck Test 3 Bending Plasticized (Bending easily) Toughened bending other doesn’t Bending easily Doesn’t bend Doesn’t bend Table 4. Six tests to help identify plastics type
PhenolicPVC/uPVCAcrylicPolystyrenePolyethyleneTest 4Goes “floppy"Goes“floppyGoes‘floppyResists heat/Goes ‘floppyHeatingwhen heating/burningon heating/on heating/onandheating/candlewood smellfruity smellpungent smellmarigold smellsmellresultantsmellTest 5SelfDifficult toDense blackPlastic drips onBubbles andBurningburn, soot,smoke, melts,meltingextinguishingboils, blackswells &white smoke,bubbles atbits producedselfedgescracks whenheated.extinguishTest 6SinksSinksSinksFloatsSinksDensity
PVC/uPVC Polystyrene Polyethylene Phenolic Acrylic Test 4 Heating and resultant smell Goes “floppy” when heating/ pungent smell Goes ‘floppy’ on heating/ marigold smell Goes ‘floppy’ on heating/candle smell Resists heat/ burning wood smell Goes ‘floppy’ on heating/ fruity smell Test 5 Burning Difficult to burn, soot, white smoke, self extinguish. Dense black smoke, melts, bubbles at edges Plastic drips on melting Self extinguishing swells & cracks when heated. Bubbles and boils, black bits produced Test 6 Density Sinks Sinks Floats Sinks Sinks
2.3.1 Phenolics
2.3.1 Phenolics
OHOHOHCH20-RepeatnCH,OPF thermoset polymers
Synthesis:One stage ProcessTwo stage Process
Synthesis: ● One stage Process ● Two stage Process