High impact polystyrene (HIPS) is a significant polymer known for its versatility, impact resistance, and cost-effectiveness, often used in low-strength structural applications. It has various applications, including consumer products, automotive parts, and food service items, and offers good chemical resistance, recyclability, and machinability. The document also includes information on synthesis and properties of HIPS, along with references for further reading.

1. High Impact
Polystyrene(HIPs)
Prepared By: Gaurav Dave (130990136011)
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2. Content
 Introduction
 Properties
 Synthesis
 Applications
 References
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3. Introduction
 Polystyrene is the fourth biggest polymer produced in the world after
polyethylene, polyvinyl chloride and polypropylene.
 High Impact Polystyrene (HIPS) is a versatile, economical and impact-resistant
plastic that is easy to machine and fabricate.
 HIPS is often specified for low strength structural applications when impact
resistance, machinability, and low cost are required.
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5. RESISTANCE TO CHEMICALS
 Dilute Acid **
 Dilute Alkalis ****
 Oils and Greases **
 Aliphatic Hydrocarbons ****
 Aromatic Hydrocarbons *
 Halogenated Hydrocarbons *
 Alcohols * variable
KEY * poor, ** moderate, *** good, **** very good
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6. General Properties
 Maintains strength in high-impact applications
 Can be painted
 Recyclable with good property retention
 Easily moldable
 FDA compliant grades
 Good dimensional stability
 Good gloss
 Low volatility
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7. Synthesis
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8.  Styrene
 Butadiene rubber
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10. Applications
 Yoghurt pots, refrigerator linings, vending cups, bathroom cabinets, toilet
seats and tanks, closures, instrument control knobs.
 It is frequently used machining pre-production prototypes since it has
excellent dimensional stability and is easy to fabricate, paint, and glue.
 Consumer products: Appliance components, toy, TV and audio-visual
equipment parts, recording tape cassettes, bicycle trailer, toys.
 Automotive industry: Instrument panels and fittings, gasoline tanks.
 Food Services: Hot and cold drinking cups.
 Office Products: Computer Housings.
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11. References
 http://www.bpf.co.uk
 http://www.eng-tips.com
 http://www.lgchem.com
 https://www.plasticsintl.com
 http://www.blackwellplastics.com/HIPS.html
 www.eni.com
 http://www.polystyrenepackaging.co.za
 http://www.makeitfrom.com
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