IPS名词解释

ity:proportion of stereoregular polymer in total polymer.

uration:The fixed spatial arrangement of atoms in organic molecules

-growth

polymerization:step/wise

reaction

between

the

funcional

groups

of

reactants.

-growth polymerization:initiator species R* with a reactive center-free radical. Cation

l

polymerization:The polymerization which has no termination and transfer

radical polymerization: The polymerization which uses free radical for chain-initiation

tion:The first process of polymerization which produce free radical polymerization

on

polymeriza tion

：

The

polymerization

which

uses

emulsifier

for

making

the

monomer become emulsion in water

sion polymerization:The polymerization which adds initiators to the suspension in

water.

mation:three dimensional geometric arrangement of the polymer, which changes

easily when the bonds are rotated.

17:excluded volume: one part of a long chain molecule can not occupy space that is already

occupied by another part of the same molecule

llinity:

is

usually

specified

as

a

percentage

of

the

volume

of

the

material

that

is

crystalline.

crystal: A solid in which the crystal lattice of the entire sample is continuous and

unbroken to the edges of sample,with no grain boundaries.

lite:Typia for spherulites arethe maltese crosses which indicate the orientation of

polarizer and analyzer and the ring patterns.

s of crystallization:

-

order

phase

transition:

A

first-order

transition

is

defined

as

on

for

which

a

discontinuity occurs in the first derivative of the Gibbs free energy

-order phase transition:

Glass transition Temperature: the temperature that marks the chain

’

s transition from the

frozen state to the moving state is called the Tg.

volume:the

unoccupied

space

in

a

sample

arising

from

the

inefficient

packing

of

disordered chains in the amorphous regions.

stiffness:the difficulty with which the backbone chain bonds can rotate.

31. Rheology: The material deformation and flow properties under the action of external

force , mainly refers to the connections between viscosity and stress deformation strain rate

in the processing,

32. Newtonian fluid: Newton fluid is a low viscous fluid, the rate between shear stress and

deformation is proportional .

33. Shear-thinning: Is a phenomenon, in the processing of pseudo plastic fluid, the apparent

viscosity decreases with the increase of shear stress .