[C.H.V]

Nhờ các bạn giải thích nghĩa 2 cụm từ là "low profile additives" (mình hiểu là chất phụ gia định hình thấp)và "intramicrogel and intermicrogel crosslinking" trong đoạn sau nghĩa là gì.

"The inclusion of low profile additives such as poly(vinyl acetate) (PVAc) and poly(methyl methacrylate) into PER may overcome the high polymerization shrinkage occurr copolymerization of the unsaturated poly with the crosslinking monomer. Pattison et al. [12, 13] indicated that in either single-phase or two-phase unsaturated polyester resin blends, thermal expansion of styrene monomer in the early curing stage and stress-induced cracking in the later stage have important roles in the low profile and low shrink behaviour of these blends. Huang and Su studied the effect of low profile additive [14] and comonomer [15] on the curing kinetics of polyester resins in detail and found that intramicrogel and intermicrogel crosslinking reactions predominated the curing reaction in the early and later stage, respectively. As a successful routine of modification, the mechanical properties of PER can be improved through inclusion of reactive liquid rubbers to the system"




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