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Citation: Zhang Lihua, Jiang Shimin, Qi Yuchen, Li Shuhua, Zhang Zicheng. RAOIATION EFFECT ON CRYSTALLINE POLYMERS——NUCLEATION EFFECT OF POLYFUNCTIONAL MONOMERS ON CRYSTALLIZATION AND RADIATION CROSSLINKING OF LDPE[J]. Chinese Journal of Applied Chemistry, ;1989, 6(2): 36-39. shu

RAOIATION EFFECT ON CRYSTALLINE POLYMERS——NUCLEATION EFFECT OF POLYFUNCTIONAL MONOMERS ON CRYSTALLIZATION AND RADIATION CROSSLINKING OF LDPE

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 7 March 1988
Available Online: 4 August 1988

The nucleation effect of some polyfunctional monomers on radiation crosslinking of low density polyethylene (LDPE) has been studied. The effect of monomer structure on the moiphological structure of LDPE and the relationship between radiation crosslinking and crystalline density of LDPE with different monomer were discussed according to the results of WAXD, TEM, DSC and gel fraction measurements. It is found that in the presence of monomer the crystalline content of LDPE was larger and the crystalline size was smaller than that of LDPE alone, and the greater the nucleation effect, the more accelerated the radiation crosslinking effect for LDPE. It is considered that both crystalline density and size are the primary (basis) factors in radiation crosslinking of crystalline polymers, and the crystalline damage caused by irradiation is closely relevent to the surface area between crystalline and amorphous regions of the polymer.
- LDPE,
- Radiation crosslinking,
- Nucleation effect,
- Polyfunctional monomer
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