D. Polime diing de san xuat to phai cd mach cacbon khong nhanh, xep song song, khong dgc, cd kha nang nhugm mau, mem dai.
HS nhdm 4 thao luan va dien thong tin vao bang dudi sy budng dan, dieu khien cua GV cho ket qua
cua GV cho ket qua
' Khai niem Tinh chit hoa hpc Dieu che Polime
Polime hay hgp chat cao phan tu la nhirng hgp chat CO phan tir khoi Idm do nhieu dan vi ca sd gpi la mat xich lien kit vdi nhau tao nen
Co phan u^ng phan cat mach, giir nguyen mach va phat trien mach
Phan ling triing hgp: la qua trinh kit hgp nhieu phan tir nho (monome) giong nhau hoac tuang tu
Vdt lieu Polime
A. Chat deo la nhung vat lieu polime co
tinh deo.
Mot so chit polime dung lam chat deo l.Poliedlen(PE)
nCH2=CH2 "'•'" > -fCH2-CH2-% ' 2. Poli (vinyl clorua) (PVC)
nCH2=CH '''''° > tGH2-Cl^:j;r
Polinte
nhau thanh phan tir Idn (polime)
- Phan irng triing ngung: la qua trinh ket hgp nhieu phan tir nho (monome) thanh phan tir Idn (polime) dong thdi giai phong nhung phart tir nho khac (nhu HjO)
Vdt li?u Polime
3. Poli (metyl metacrylat) CH3 nCH2=C COOH CH3 ^^l^i^ -tCH2-C X COOH B. To la nhirng polime hinh sgi dai va manh vdi do ben nhat dinh.
1. Ta nilon-6,6 -^NH-[CH2]6-NH-CO-[CH2]4-CO-j;; 2. To nitron nCH2=CH- CN xt,r -> -eCH2-CHt„ CN
C. Cao su la loai vat lieu polime co tinh dan hoi. 1. Cao su ty nhien -tCH2-C =CH-CH2l;^ CH3 2. Cao su tong hgp -tCH2-CH=CH-CH2-X
D. Keo dan la loai vat lieu co kha nang ket dinh hai manh vat lieu ran khac nhau.
1. Keo dan epoxit
2. Keo dan ure-fomandehit
GV Nhan xet ket qua trinh bay kien thiic cua timg nhdm, sau dd chieu cac bang tong ket kien thuc len man hinh cho HS b l sung he thing lai nhiing kien thiic con thieu.
GV chuan bi he thong cac bai tap cho cac chuong cho HS on tap^''