A) A large molecule composed of repeating structural units B) A single atom C) A small inorganic molecule D) A type of metal
A) Ring-opening polymerization B) Decomposition polymerization C) Addition polymerization D) Condensation polymerization
A) The temperature at which the polymer decomposes B) The temperature at which the polymer transitions from a glassy to a rubbery state C) The temperature at which the polymer crystallizes D) The temperature at which the polymer melts
A) To decrease polymer density B) To enhance polymer solubility C) To reduce polymer chain length D) To increase mechanical strength and stability
A) Molecular weight has no effect on viscosity B) Increased molecular weight leads to higher viscosity C) Increased molecular weight decreases viscosity D) Increased molecular weight leads to lower elasticity
A) To explain the thermodynamics of polymer solutions and blends B) To model polymer chain conformation C) To determine polymer degradation kinetics D) To predict the mechanical properties of polymers
A) To inhibit polymer chain flexibility B) To increase the glass transition temperature C) To enhance polymer solubility D) To promote the formation of small crystalline regions in a polymer
A) To enhance or modify the properties of polymers B) To reduce polymer flexibility C) To break down polymer chains D) To decrease polymer durability
A) A polymer composed of two or more different monomers B) A polymer with a high degree of crystallinity C) A single monomer molecule D) A polymer with only one repeating unit
A) To induce polymer degradation B) To increase mechanical strength and prevent slippage of polymer chains C) To decrease polymer solubility D) To promote polymer crystallization
A) The glassy state does not affect polymer properties B) The glassy state promotes polymer flexibility C) The glassy state is for amorphous polymers only D) In the glassy state, the polymer is hard and brittle
A) Flory B) Pierre-Gilles de Gennes C) Doi and Edwards D) I. M. Lifshitz
A) Simple random walk B) Brownian motion C) Directed walk D) Self-avoiding random walk
A) √N. B) bN. C) N/b. D) 0.
A) ⟨R ⋅ R⟩ = N²b² B) ⟨R ⋅ R⟩ = 3Nb² C) ⟨R ⋅ R⟩ = Nb D) ⟨R ⋅ R⟩ = b³
A) None of these B) Bad solvent C) Theta solvent D) Good solvent
A) x_rms = √bN. B) x_rms = bN. C) x_rms = N/b. D) x_rms = b√N.
A) Statistical physics B) Condensed matter physics C) Thermodynamics D) Polymer chemistry
A) 1/3 B) 1/2 C) 3/5 D) 1/4
A) Behaves like a solid sphere B) Forms a fractal object C) Becomes an ideal chain D) Expands significantly
A) ⟨ri ⋅ rj⟩ = R² B) ⟨ri ⋅ rj⟩ = b²δij C) ⟨ri ⋅ rj⟩ = Nδij D) ⟨ri ⋅ rj⟩ = 3b²δij
A) Hindered rotation model B) Real chain models C) Worm-like chain model D) Ideal chain models
A) S(R) = kB ln(Ω(R)) B) S(R) = ln(kBΩ(R)) C) S(R) = Ω(R)/kB D) S(R) = kBΩ(R)
A) Exactly 25 nm. B) More than 100 nm. C) About 50 nm. D) Less than 10 nm.
A) Ω(R) = R/P(R) B) Ω(R) = P(R)/c C) Ω(R) = cP(R) D) Ω(R) = cR
A) Uniform distribution B) Exponential distribution C) Binomial distribution D) Gaussian distribution
A) Good solvent B) Bad solvent C) Theta solvent D) None of these
A) A Boltzmann factor based on potential energy. B) Persistence length. C) Fixed bond angles due to chemical bonding. D) Positions of minima in rotational potential energy.
A) ΔF = TΔS(R) B) ΔF = kBΔS(R) C) ΔF = -TΔS(R) D) ΔF = S(R)/T
A) Finite extensible nonlinear elastic model B) Freely-jointed chain model C) Worm-like chain model D) Rotational isomeric state model
A) Brownian motion B) Self-avoiding random walk C) Directed walk D) Simple random walk
A) Worm-like chain model B) Hindered rotation model C) Rotational isomeric state model D) Freely-rotating chain |