8/12/2019 Synthetic Polymers SPM

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17 (a) The figure above show the products of thermoplastic. State four reasons why the

above products are thermoplastic and not thermoset.

Rajah di atas menunjukkan produk termoplastik. Nyatakan empat sebab mengapa

produk di atas adalah termoplastik dan bukan termoset.

[4 marks

(b) ! local council found that the rubbish dumped by the public mostly is made of plastic.

"#plain how the local council can solve the problem of disposal of plastic rubbish.

Satu pertubuhan tempatan mendapati bahawa sampah yang dibuang oleh orang

awam kebanyakannya adalah diperbuat daripada plastik. Jelaskan bagaimana

pertubuhan tempatan berkenaan dapat menyelesaikan masalah pelupusan sampah

yang diperbuat daripada plastik tersebut.

$our e#planation should include the following%

Penjelasan anda mestilah mengandungi yang berikut:

&dentify the problem'penyelesaian masalah [1 mark

larification of the problem'penjelasan kepada masalah [1 mark

Solving methods'kaedah penyelesaian masalah [ marks

hoose the best method and e#plain your choice'pilih kaedah

terbaik dan jelaskan pilihan anda

[1 mark

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1* (a) +olymer synthetic is very useful in modern life. ,escribe four negative effects of the

consumption and disposal of polymer synthetic in the environment.

Sintetik polimer sangat berguna dalam kehidupan moden. Jelaskan empat kesan

negatif bagi penggunaan dan pembuangan sintetik polimer kepada persekitaran.

[4 marks

(b)

The figure above show the plastic which can be recycled. Study the information above

and construct the concept of recycling.

Rajah di atas menunjukkan plastik yang boleh dikitar semula. Kaji maklumat di atas dan

reka satu konsep kitar semula.

$our answer should be based on the following steps%

Jawapan anda haruslah berdasarkan kepada langkah-langkah berikut:

&dentify two common characteristics'kenalpasti dua iri umum [- marks

,evelop initial concept'bina konsep awal [1 mark ive an e#ample of another recycleable and non/recycleable

plastic'berikan ontoh lain untuk plastik yang boleh dikitar semula

dan plastik yang tidak boleh dikitar semula

[- marks

State the actual concept of recycleable plastic'nyatakan konsep

asal bagi plastik yang boleh dikitar semula

[1 mark

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ANSWER :

17

(a) / the products have low resistance toward heat

/ the products are soft

/ the products can be recycled as the material can be moulded few times

/ the products do not have cross lin0age between the polymers chain/ the products have low melting point

[any 4 points

(b)

&dentify the problem +lastic rubber is not biodegradable and causes

environmental pollution.

larification of the problem ow can we reduce environmental pollution

caused by plastic rubbish2

Solving methods 1. 3se biodegradable plastic which can be

decomposed by microorganism.

-. urn the disposed plastic in an incinerator.

. 5ecycle the disposed plastic into plastic

product that can be used again

4. 5euse the plastic for other purposes.

hoose the best method and

e#plain your choice

5ecycle because thermoplastic can be moulded

a few times as it can reduce the disposal of

plastic and save sources of plastic raw materials

ANSWER:

18

(a) (i) +olymer synthetic is not biodegradable and it will be in the environment for a long

period which may cause environmental pollution. (ii) 6pen burning of polymer synthetic releases soot and to#ic gases such as dio#in which

may cause air pollution and public health problem.

(iii) ,isposal of plastic in the drainage may cause bloc0age of drainage system and flash

flood. &t may encourage the breeding of mosuitoes.

(iv) ,isposal of plastic in sea and river may cause e#tinction of turtle and other auatic

life.

(b)

Two common characteristics The plastics can be repeatedly moulded into a variety

of shapes.

The polymer chains of the plastic can slide from oneto another when heated and come together when

cooled.

&nitial concept +lastic which can be recycled is the plastic which can

be repeatedly moulded into various shapes and the

polymer chains can slide from one another when

heated.

"#ample

8on e#ample

+olypropene ' polystyrene

a0elite ' melamine ' epo#y glue

!ctual concept Thermoplastic can be recycled for other purposes that

can be moulded into new products