Hogt dgng cda GV Hogt dgng cda HS
Hogt dgng 1
I. KHAI NIEM, PHAN LOAI VA DANH PHAP I.KHAINIEM I.KHAINIEM
GV chilu len man hinh cong thiic cau HS quan sat va cho biet. tao ciia mot so polime:
Polietilen - [ Cni-CWi"^
Nilon-6 -tNH-(CH2)5-COtn
Caosu buna -\ CH2-CH=CH-CH2-i-n
Yeu ciu HS quan sat va neu khai niem:
- Polime. - Mat xich. - He so triing hgp.
2. P H A N L O A I
- Polime la nhirng hgp chat c6 khoi
lugng phan tir rat Ion do nhieu don vi co so lien ket voi nhau tao thanh.
- Mdt xich la don vi co so lien ket voi
nhau tao thanh polime.
- He s6 n ggi la he so triing hgp hay do
polime boa.
GV cho HS nghien ciiu SGK yeu cau nhan xet ve
- each phan loai polime. - Cho cac vi du minh hoa.
HS nghien ciiu SGK va nhan xet.
- Phdn logi polime dua vao nguon goc:
+ Polime ting hgp (do con nguoi ting hgp) vi du: polietilen, poli(vinyl clorua)... + Polime thien nhien (co sin trong tu nhien) vi du: xenlulozo, tinh bgt...
+ Polime ban ting hgp (la polime thien nhien do con nguoi cai bien mot phan) Vi du: to visco, to axetat...
- Phdn logi theo cdch tong hap
+ Polime trimg hgp vi du: polietilen... + Polime triing ngung vi du nilon-6,6...
Hogt dgng cua GV Hogt dgng cda HS
3.DANHPHAP GV cho HS nghien ciiu SGK yeu ciu
nhan xet ve
- Cach gpi ten polime. - Cho cac vi du minh hpa.
HS nghien ciiu SGK va nhan xet. - cau tnic ten polime
Ten polime = poli + ten monome
Vidu: - f C H 2 - C H 2 ^ Polietilen (adsbygoogle = window.adsbygoogle || []).push({});
Neu monome co ten gom 2 cum tir tro len dugc dat trong dau ngoac don.
Vi du:
-fCH2-CHCl^n Poli(vinyl clonia) Mot so polime dugc gpi theo ten thong thuong nhu:
-[ CF2-CF2 ^ Teflon
(C6Hio05)n Xenlulozo -^NH-(CH2)5-CO ] F Nilon-6
Hogt dgng 2